Updated on 2023/10/11

写真a

 
NOJIRI, Shin'ichi
 
Organization
Graduate School of Science Professor
Graduate School
Graduate School of Science
Undergraduate School
School of Science
Title
Professor
Contact information
メールアドレス
External link

Degree 1

  1. 京都大学理学博士 ( 1986.3   京都大学 ) 

Research Interests 2

  1. gravity

  2. quantum field theory

Research Areas 1

  1. Others / Others  / Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics

Current Research Project and SDGs 2

  1. quantum gravity

  2. dark energy, dark matter

Research History 9

  1. Nagoya University   Graduate School of Science Division of Particle and Astrophysical Sciences Fundamental Theoretical Physics   Professor

    2006.4

  2. National Defense Academy   Associate Professor

    1997.4 - 2006.3

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    Country:Japan

  3. National Defense Academy   Lecturer

    1995.4 - 1997.3

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    Country:Japan

  4. National Defense Academy   Assistant

    1992.4 - 1995.3

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    Country:Japan

  5. The University of Tokyo

    1991.11 - 1992.3

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    Country:Japan

  6. Ochanomizu University

    1991.4 - 1995.3

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    Country:Japan

  7. 高エネルギー物理学研究所   非常勤講師(客員研究員)

    1989.4 - 1991.3

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    Country:Japan

  8. Kyoto University   Researcher

    1987.4 - 1989.3

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    Country:Japan

  9. Kyoto University

    1986.4 - 1987.3

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    Country:Japan

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Education 3

  1. Kyoto University   Graduate School, Division of Natural Science

    1983.4 - 1986.3

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    Country: Japan

  2. Kyoto University   Graduate School, Division of Natural Science

    1981.4 - 1983.3

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    Country: Japan

  3. Kyoto University

    1977.4 - 1981.3

Professional Memberships 1

  1. 日本物理学会

Committee Memberships 4

  1.   PTEP執行編集委員  

    2020.4   

  2.   素粒子メダル奨励選考委員  

    2014.4 - 2016.3   

  3.   湯川記念財団・木村利栄理論物理学賞選考委員  

    2014.4 - 2015.3   

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    Committee type:Academic society

  4.   京都大学基礎物理学研究所運営協議会委員  

    2013.4 - 2017.3   

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    Committee type:Academic society

Awards 6

  1. Highly Cited Researcher in 2018

    2018.11   Clarivate Analytics  

  2. Highly Cited Researcher in 2017

    2017.11   Clarivate Analytics  

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    Country:United States

  3. Highly Cited Researcher in 2016

    2016.11   Clarivate Analytics  

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    Country:United States

  4. Highly Cited Researcher in 2015

    2015.12   Thomson Reuters  

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    Country:United States

  5. Highly Cited Researcher in 2014

    2014.12   Thomson Reuters  

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    Country:United States

  6. Honorary Professor

    2014.8   Tomsk State Pedagogical University  

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    Country:Russian Federation

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Papers 373

  1. Modified gravity theories on a nutshell: Inflation, bounce and late-time evolution Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS   Vol. 692   page: 1-104   2017.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physrep.2017.06.001

    Web of Science

  2. Unified cosmic history in modified gravity: From F(R) theory to Lorentz non-invariant models Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS   Vol. 505 ( 2-4 ) page: 59-144   2011.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physrep.2011.04.001

    Web of Science

  3. Introduction to modified gravity and gravitational alternative for dark energy Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D.

    INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS   Vol. 4 ( 1 ) page: 115-145   2007.2

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    Web of Science

  4. Properties of singularities in (phantom) dark energy universe Reviewed International coauthorship

    Shin'ichi Nojiri, Sergei D. Odintsov, Shinji Tsujikawa

    Phys.Rev.   Vol. D71   page: 063004   2005

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  5. Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration Reviewed International coauthorship

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D68   page: 123512   2003

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    The modified gravity, which eliminates the need for dark energy and which seems to be stable, is considered. The terms with positive powers of the curvature support the inflationary epoch while the terms with negative powers of the curvature serve as effective dark energy, supporting current cosmic acceleration. The equivalent scalar-tensor gravity may be compatible with the simplest solar system experiments.

  6. Unifying inflation with early and late dark energy in Einstein-Gauss-Bonnet gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Gomez Diego Saez-Chillon

    PHYSICS OF THE DARK UNIVERSE   Vol. 41   2023.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.dark.2023.101238

    Web of Science

  7. Generalized black hole entropy in two dimensions Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D. D., Faraoni Valerio

    INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS   Vol. 20 ( 09 )   2023.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1142/S0219887823501487

    Web of Science

  8. Holographic realization of constant roll inflation and dark energy: An unified scenario Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    PHYSICS LETTERS B   Vol. 841   2023.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physletb.2023.137926

    Web of Science

  9. Revisiting compact star in F(R) gravity: Roles of chameleon potential and energy conditions Reviewed International coauthorship

    Numajiri Kota, Cui Yong -Xiang, Katsuragawa Taishi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 107 ( 10 )   2023.5

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.107.104019

    Web of Science

  10. Slow-rotating charged black hole solution in dynamical Chern-Simons modified gravity Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shinichi

    PHYSICAL REVIEW D   Vol. 107 ( 6 )   2023.3

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.107.064069

    Web of Science

  11. Slow-rotating black holes with potential in dynamical Chern-Simons modified gravitational theory Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin'ichi

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 2 )   2023.2

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1475-7516/2023/02/033

    Web of Science

  12. Isotropic compact stars in four-dimensional Einstein-Gauss-Bonnet gravity coupled with scalar field: reconstruction of model Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin'ichi

    EUROPEAN PHYSICAL JOURNAL C   Vol. 83 ( 1 )   2023.1

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1140/epjc/s10052-022-11165-4

    Web of Science

  13. New Entropies, Black Holes, and Holographic Dark Energy Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Faraoni V.

    ASTROPHYSICS     2023.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10511-023-09759-1

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  14. Black Holes with Electric and Magnetic Charges in F(R) Gravity Reviewed International coauthorship

    Nashed G. G. L., Nojiri S.

    FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS     2022.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/prop.202200091

    Web of Science

  15. Modified cosmology from the thermodynamics of apparent horizon

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    PHYSICS LETTERS B   Vol. 835   2022.12

  16. Formalizing anisotropic inflation in modified gravity Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K., Constantini A.

    NUCLEAR PHYSICS B   Vol. 985   2022.12

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    DOI: 10.1016/j.nuclphysb.2022.116011

    Web of Science

  17. Alternative entropies and consistent black hole thermodynamics Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Faraoni Valerio

    INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS   Vol. 19 ( 13 )   2022.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1142/S0219887822502103

    Web of Science

  18. 2D F(R) gravity and AdS(2)/CFT1 correspondence Reviewed International coauthorship

    Nojiri S., Odintsov S. D.

    EPL   Vol. 139 ( 6 )   2022.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1209/0295-5075/ac8ba0

    Web of Science

  19. Early and late universe holographic cosmology from a new generalized entropy Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    PHYSICS LETTERS B   Vol. 831   2022.8

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    DOI: 10.1016/j.physletb.2022.137189

    Web of Science

  20. Multihorizons black hole solutions, photon sphere, and perihelion shift in weak ghost-free Gauss-Bonnet theory of gravity Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin ' ichi

    PHYSICAL REVIEW D   Vol. 106 ( 4 )   2022.8

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    DOI: 10.1103/PhysRevD.106.044024

    Web of Science

  21. Consistency between black hole and mimetic gravity - Case of (2+1)-dimensional gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Nashed G. G. L.

    PHYSICS LETTERS B   Vol. 830   2022.7

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    DOI: 10.1016/j.physletb.2022.137140

    Web of Science

  22. Integral F (R) gravity and saddle point condition as a remedy for the H-0-tension Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    NUCLEAR PHYSICS B   Vol. 980   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nuclphysb.2022.115850

    Web of Science

  23. Black holes with Lagrange multiplier and potential in mimetic-like gravitational theory: multi-horizon black holes Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin'ichi

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 5 )   2022.5

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1475-7516/2022/05/011

    Web of Science

  24. Compact star in general F(R) gravity: Inevitable degeneracy problem and non-integer power correction Reviewed International coauthorship

    Numajiri Kota, Katsuragawa Taishi, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 826   2022.3

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    DOI: 10.1016/j.physletb.2022.136929

    Web of Science

  25. Towards a smooth unification from an ekpyrotic bounce to the dark energy era Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    PHYSICS OF THE DARK UNIVERSE   Vol. 35   2022.3

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    DOI: 10.1016/j.dark.2022.100984

    Web of Science

  26. From nonextensive statistics and black hole entropy to the holographic dark universe Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Faraoni Valerio

    PHYSICAL REVIEW D   Vol. 105 ( 4 )   2022.2

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    DOI: 10.1103/PhysRevD.105.044042

    Web of Science

  27. Barrow entropic dark energy: A member of generalized holographic dark energy family Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    PHYSICS LETTERS B   Vol. 825   2022.2

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    DOI: 10.1016/j.physletb.2021.136844

    Web of Science

  28. Specific neutral and charged black holes in f(R) gravitational theory Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shinichi

    PHYSICAL REVIEW D   Vol. 104 ( 12 )   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.104.124054

    Web of Science

  29. Dressed asymptotic states and QED infrared physics Reviewed

    Furugori Hideo, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 104 ( 12 )   2021.12

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    DOI: 10.1103/PhysRevD.104.125004

    Web of Science

  30. Ghost-free F (R, G) gravity Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K., Popov Arkady A.

    NUCLEAR PHYSICS B   Vol. 973   2021.12

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    DOI: 10.1016/j.nuclphysb.2021.115617

    Web of Science

  31. Rotating black hole in f(R) theory Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin'ichi

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 11 )   2021.11

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    DOI: 10.1088/1475-7516/2021/11/007

    Web of Science

  32. Area-law versus Renyi and Tsallis black hole entropies Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Faraoni Valerio

    PHYSICAL REVIEW D   Vol. 104 ( 8 )   2021.10

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    DOI: 10.1103/PhysRevD.104.084030

    Web of Science

  33. Analytic charged BHs in f (R) gravity Reviewed International coauthorship

    Nashed G. G. L., Nojiri S.

    PHYSICS LETTERS B   Vol. 820   2021.9

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    DOI: 10.1016/j.physletb.2021.136475

    Web of Science

  34. Thermal effects and scalar modes in the cosmological propagation of gravitational waves Reviewed International coauthorship

    Capozziello S., Nojiri S., Odintsov S. D.

    PHYSICS OF THE DARK UNIVERSE   Vol. 33   2021.9

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    DOI: 10.1016/j.dark.2021.100867

    Web of Science

  35. Mimetic Euler-Heisenberg theory, charged solutions, and multihorizon black holes Reviewed International coauthorship

    Nashed G. G. L., Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 104 ( 4 )   2021.8

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    DOI: 10.1103/PhysRevD.104.044043

    Web of Science

  36. Statistical system based on p-adic numbers Reviewed

    Terasawa Mikoto, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 819   2021.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physletb.2021.136410

    Web of Science

  37. Different Faces of Generalized Holographic Dark Energy Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Paul Tanmoy

    SYMMETRY-BASEL   Vol. 13 ( 6 )   2021.6

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    DOI: 10.3390/sym13060928

    Web of Science

  38. Modeling and testing the equation of state for (Early) dark energy Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Gomez Diego Saez-Chillon, Sharov German S.

    PHYSICS OF THE DARK UNIVERSE   Vol. 32   2021.5

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    DOI: 10.1016/j.dark.2021.100837

    Web of Science

  39. Searching for dynamical black holes in various theories of gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Faraoni Valerio

    PHYSICAL REVIEW D   Vol. 103 ( 4 )   2021.2

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    DOI: 10.1103/PhysRevD.103.044055

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  40. Nontrivial black hole solutions in f(R) gravitational theory Reviewed International coauthorship

    Nashed G. G. L., Nojiri S.

    PHYSICAL REVIEW D   Vol. 102 ( 12 )   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.102.124022

    Web of Science

  41. The dark universe future and singularities: The account of thermal and quantum effects Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS OF THE DARK UNIVERSE   Vol. 30   2020.12

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.dark.2020.100695

    Web of Science

  42. Considerations on gravitational waves in higher-order local and non-local gravity Reviewed International coauthorship

    Capozziello S., Capriolo M., Nojiri S.

    PHYSICS LETTERS B   Vol. 810   2020.11

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    DOI: 10.1016/j.physletb.2020.135821

    Web of Science

  43. Unifying inflation with early and late-time dark energy in F(R) gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Oikonomou V. K.

    PHYSICS OF THE DARK UNIVERSE   Vol. 29   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.dark.2020.100602

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  44. Unifying holographic inflation with holographic dark energy: A covariant approach Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K., Paul Tanmoy

    PHYSICAL REVIEW D   Vol. 102 ( 2 )   2020.7

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    DOI: 10.1103/PhysRevD.102.023540

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  45. F(R) gravity with an axion-like particle: Dynamics, gravity waves, late and early-time phenomenology Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K.

    ANNALS OF PHYSICS   Vol. 418   2020.7

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    DOI: 10.1016/j.aop.2020.168186

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  46. Ghost-free non-local F (R) gravity cosmology Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K.

    PHYSICS OF THE DARK UNIVERSE   Vol. 28   2020.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.dark.2020.100541

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  47. Propagation of gravitational waves in Chern-Simons axion F(R) gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K., Popov Arkady A.

    PHYSICS OF THE DARK UNIVERSE   Vol. 28   2020.5

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    DOI: 10.1016/j.dark.2020.100514

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  48. Challenging matter creation models in the phantom divide Reviewed International coauthorship

    Cardenas Victor H., Cruz Miguel, Lepe Samuel, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 101 ( 8 )   2020.4

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    DOI: 10.1103/PhysRevD.101.083530

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  49. Novel cosmological and black hole solutions in Einstein and higher-derivative gravity in two dimensions Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D.

    EPL   Vol. 130 ( 1 )   2020.4

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    DOI: 10.1209/0295-5075/130/10004

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  50. Spherically symmetric black holes with electric and magnetic charge in extended gravity: physical properties, causal structure, and stability analysis in Einstein's and Jordan's frames Reviewed International coauthorship

    Elizalde E., Nashed G. G. L., Nojiri S., Odintsov S. D.

    EUROPEAN PHYSICAL JOURNAL C   Vol. 80 ( 2 )   2020.2

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1140/epjc/s10052-020-7686-3

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  51. Correspondence of cosmology from non-extensive thermodynamics with fluids of generalized equation of state Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Saridakis Emmanuel N., Myrzakulov R.

    NUCLEAR PHYSICS B   Vol. 950   2020.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nuclphysb.2019.114850

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  52. Holographic bounce Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Saridakis Emmanuel N.

    NUCLEAR PHYSICS B   Vol. 949   2019.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.nuclphysb.2019.114790

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  53. Nonsingular bounce cosmology from Lagrange multiplier <i>F</i>(<i>R</i>) gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K., Paul Tanmoy

    PHYSICAL REVIEW D   Vol. 100 ( 8 )   2019.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.100.084056

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  54. Screened and unscreened solutions for relativistic star in de Rham-Gabadadze-Tolley massive gravity Reviewed International coauthorship

    Yamazaki Masashi, Katsuragawa Taishi, Odintsov Sergei D., Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 100 ( 8 )   2019.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.100.084060

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  55. Holographic inflation Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Saridakis Emmanuel N.

    PHYSICS LETTERS B   Vol. 797   2019.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physletb.2019.134829

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  56. Propagation of gravitational waves in Chern-Simons axion Einstein gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K., Popov Arkady A.

    PHYSICAL REVIEW D   Vol. 100 ( 8 )   2019.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.100.084009

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  57. Viable inflationary models in a ghost-free Gauss-Bonnet theory of gravity Reviewed International coauthorship

    Nojiri Shin'ichi, Odhitsov S. D., Oikonomou V. K., Chatzarakis N., Paul Tanmoy

    EUROPEAN PHYSICAL JOURNAL C   Vol. 79 ( 7 )   2019.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1140/epjc/s10052-019-7080-1

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  58. Gravitational waves in the presence of viscosity Reviewed International coauthorship

    Brevik Iver, Nojiri Shin'ichi

    INTERNATIONAL JOURNAL OF MODERN PHYSICS D   Vol. 28 ( 10 )   2019.7

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    DOI: 10.1142/S0218271819501335

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  59. k-essence f(R) gravity inflation Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    NUCLEAR PHYSICS B   Vol. 941   page: 11 - 27   2019.4

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    DOI: 10.1016/j.nuclphysb.2019.02.008

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  60. Modified cosmology from extended entropy with varying exponent Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Saridakis Emmanuel N.

    EUROPEAN PHYSICAL JOURNAL C   Vol. 79 ( 3 )   2019.3

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    DOI: 10.1140/epjc/s10052-019-6740-5

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  61. Ghost-free Gauss-Bonnet theories of gravity Reviewed International coauthorship

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    PHYSICAL REVIEW D   Vol. 99 ( 4 )   2019.2

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    DOI: 10.1103/PhysRevD.99.044050

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  62. Cosmological singularities in interacting dark energy models with an omega(q) parametrization Reviewed International coauthorship

    Elizalde Emilio, Khurshudyan Martiros, Nojiri Shin'ichi

    INTERNATIONAL JOURNAL OF MODERN PHYSICS D   Vol. 28 ( 1 )   2019.1

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    DOI: 10.1142/S0218271819500196

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  63. Topological Gravity Motivated by Renormalization Group Reviewed

    Mori Taisaku, Nojiri Shin'ichi

    SYMMETRY-BASEL   Vol. 10 ( 9 )   2018.9

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    DOI: 10.3390/sym10090396

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  64. Effects of modified gravity on the turnaround radius in cosmology Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D., Faraoni Valerio

    PHYSICAL REVIEW D   Vol. 98 ( 2 )   2018.7

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    DOI: 10.1103/PhysRevD.98.024005

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  65. Propagation of gravitational waves in strong magnetic fields Reviewed International coauthorship

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 98 ( 2 )   2018.7

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    DOI: 10.1103/PhysRevD.98.024002

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  66. The role of energy conditions in f(R) cosmology Reviewed International coauthorship

    Capozziello S., Nojiri S., Odintsov S. D.

    PHYSICS LETTERS B   Vol. 781   page: 99 - 106   2018.6

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    DOI: 10.1016/j.physletb.2018.03.064

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  67. Cosmological bound from the neutron star merger GW170817 in scalar-tensor and F(R) gravity theories Reviewed International coauthorship

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 779   page: 425-429   2018.4

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    DOI: 10.1016/j.physletb.2018.01.078

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  68. Cosmological Constant and Renormalization of Gravity

    Nojiri Shin'ichi

    GALAXIES   Vol. 6 ( 1 )   2018.3

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    DOI: 10.3390/galaxies6010024

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  69. Constant-roll inflation in F(R) gravity

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    CLASSICAL AND QUANTUM GRAVITY   Vol. 34 ( 24 )   2017.12

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    DOI: 10.1088/1361-6382/aa92a4

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  70. Ghost-free F(R) gravity with Lagrange multiplier constraint

    Nojiri S., Odintsov S. D., Oikonomou V. K.

    PHYSICS LETTERS B   Vol. 775   page: 44 - 49   2017.12

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    DOI: 10.1016/j.physletb.2017.10.045

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  71. Sequestering mechanism in scalar-tensor gravity Reviewed

    Tsukamoto Takuma, Katsuragawa Taishi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 96 ( 12 )   2017.12

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    DOI: 10.1103/PhysRevD.96.124003

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  72. Regular multihorizon black holes in modified gravity with nonlinear electrodynamics Reviewed

    Nojiri Shin'ichi, Odintsov S. D.

    PHYSICAL REVIEW D   Vol. 96 ( 10 )   2017.11

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    DOI: 10.1103/PhysRevD.96.104008

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  73. A toy model of discretized gravity in two dimensions and its extensions Reviewed

    Rotondo Marcello, Nojiri Shin'ichi

    MODERN PHYSICS LETTERS A   Vol. 32 ( 28 )   2017.9

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    DOI: 10.1142/S0217732317501498

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  74. Covariant generalized holographic dark energy and accelerating universe Reviewed

    Nojiri Shin'ichi, Odintsov S. D.

    EUROPEAN PHYSICAL JOURNAL C   Vol. 77 ( 8 )   2017.8

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    DOI: 10.1140/epjc/s10052-017-5097-x

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  75. BRS structure of simple model of cosmological constant and cosmology Reviewed

    Mori Taisaku, Nitta Daisuke, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 96 ( 2 )   2017.7

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    DOI: 10.1103/PhysRevD.96.024009

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  76. Evaporation and antievaporation instability of a Schwarzschild-de Sitter braneworld: The case of five-dimensional F(R) gravity Reviewed

    Addazi Andrea, Nojiri Shin'ichi, Odintsov Sergei

    PHYSICAL REVIEW D   Vol. 95 ( 12 )   2017.6

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    DOI: 10.1103/PhysRevD.95.124020

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  77. Evolution of gravitons in accelerating cosmologies: The case of extended gravity

    Capozziello S., De Laurentis M., Nojiri S., Odintsov S. D.

    PHYSICAL REVIEW D   Vol. 95 ( 8 )   2017.4

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    DOI: 10.1103/PhysRevD.95.083524

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  78. Some solutions for one of the cosmological constant problems Reviewed

    Nojiri Shin'ichi

    MODERN PHYSICS LETTERS A   Vol. 31 ( 37 )   2016.12

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    DOI: 10.1142/S0217732316502138

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  79. Relativistic stars in de Rham-Gabadadze-Tolley massive gravity Reviewed

    Katsuragawa Taishi, Nojiri Shin'ichi, Odintsov Sergei D., Yamazaki Masashi

    PHYSICAL REVIEW D   Vol. 93 ( 12 )   2016.6

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    DOI: 10.1103/PhysRevD.93.124013

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  80. Palatini-Born-Infeld gravity, bouncing universe, and black hole formation Reviewed

    Komada Meguru, Nojiri Shin'ichi, Katsuragawa Taishi

    PHYSICS LETTERS B   Vol. 755   page: 31-36   2016.4

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    DOI: 10.1016/j.physletb.2016.01.054

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  81. Dynamical domain wall and localization Reviewed

    Toyozato Yuta, Higuchi Masafumi, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 754   page: 139-143   2016.3

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    DOI: 10.1016/j.physletb.2016.01.024

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  82. Newton law in covariant unimodular F(R) gravity Reviewed

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    Mod.Phys.Lett. A31 (2016) no.30, 1650172     2016

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    DOI: 10.1142/S0217732316501728

  83. Unimodular-Mimetic Cosmology

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    Class.Quant.Grav. 33 (2016) no.12, 125017     2016

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    DOI: 10.1088/0264-9381/33/12/125017

  84. The bounce universe history from unimodular F(R) gravity Reviewed

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    Phys. Rev. D 93, 084050 (2016)     2016

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    DOI: 10.1103/PhysRevD.93.084050

  85. Unimodular F(R) Gravity Reviewed

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    JCAP     2016

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    DOI: 10.1088/1475-7516/2016/05/046

  86. Relativistic Stars in dRGT Massive Gravity Reviewed

    Taishi Katsuragawa, Shin'ichi Nojiri, Sergei D. Odintsov, Masashi Yamazaki

    Phys. Rev. D 93, 124013 (2016)     2016

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    DOI: 10.1103/PhysRevD.93.124013

  87. Dynamical Domain Wall and Localization Invited Reviewed

    Yuta Toyozato, Masafumi Higuchi, Shin'ichi Nojiri

    Phys.Lett. B   Vol. 754   page: 139-143   2016

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    DOI: 10.1016/j.physletb.2016.01.024

  88. Singular cosmological evolution using canonical and ghost scalar fields Reviewed

    Nojiri Shin'ichi, Odintsov S. D., Oikonomou V. K., Saridakis Emmanuel N.

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 9 )   2015.9

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    DOI: 10.1088/1475-7516/2015/09/044

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  89. Stability analysis for new theories of massive spin-two particle and black hole entropy of new bigravity Reviewed

    Ohara Yuichi, Akagi Satoshi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 92 ( 2 )   2015.7

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    DOI: 10.1103/PhysRevD.92.023011

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  90. Inflation without self-reproduction in F(R) gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    ASTROPHYSICS AND SPACE SCIENCE   Vol. 357 ( 1 )   2015.5

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    DOI: 10.1007/s10509-015-2288-5

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  91. Stability and antievaporation of the Schwarzschild-de Sitter black holes in bigravity Reviewed

    Katsuragawa Taishi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 91 ( 8 )   2015.4

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    DOI: 10.1103/PhysRevD.91.084001

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  92. Singular inflation from generalized equation of state fluids

    S. Nojiri, S. D. Odintsov, V. K. Oikonomou

    Phys.Lett. B747 (2015) 310-320     2015

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    DOI: 10.1016/j.physletb.2015.06.016

  93. Stability and Anti-evaporation of the Schwarzschild-de Sitter Black Holes in Bigravity

    Taishi Katsuragawa, Shin'ichi Nojiri

    Phys. Rev. D 91, 084001 (2015)     2015

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    DOI: 10.1103/PhysRevD.91.084001

  94. Inflation without self-reproduction in F(R) gravity

    Shin'ichi Nojiri, Sergei D. Odintsov

    Astrophys.Space Sci. 357 (2015) 1, 39     2015

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    DOI: 10.1007/s10509-015-2288-5

  95. A quantitative analysis of singular inflation with scalar-tensor and modified gravity

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    Phys.Rev. D91 (2015) 8, 084059     2015

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    DOI: 10.1103/PhysRevD.91.084059

  96. Singular cosmological evolution using canonical and phantom scalar fields

    Shin'ichi Nojiri, S.D. Odintsov, V.K. Oikonomou, Emmanuel N. Saridakis

    JCAP 1509 (2015) 09, 044     2015

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    DOI: 10.1088/1475-7516/2015/09/044, 10.1088/1475-7516/2015/9/044

  97. Stability analysis for new theories of massive spin-two particle and black hole entropy of new bigravity

    Yuichi Ohara, Satoshi Akagi, Shin'ichi Nojiri

    Phys. Rev. D 92, 023011 (2015)     2015

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    DOI: 10.1103/PhysRevD.92.023011

  98. Singular Accelerated Evolution in Massive F(R) Bigravity Reviewed

    S. Nojiri, S.D. Odintsov, V.K. Oikonomou

    Phys.Rev. D   Vol. 92 ( 12 ) page: 124059   2015

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    DOI: 10.1103/PhysRevD.92.124059

  99. New massive spin two model on a curved spacetime Reviewed

    Akagi Satoshi, Ohara Yuichi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 90 ( 12 )   2014.12

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    DOI: 10.1103/PhysRevD.90.123013

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  100. Mimetic F(R) gravity: Inflation, dark energy and bounce Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    MODERN PHYSICS LETTERS A   Vol. 29 ( 40 )   2014.12

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    DOI: 10.1142/S0217732314502113

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  101. Inflationary universe from perfect fluid and F (R) gravity and its comparison with observational data Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D., Saez-Gomez Diego

    PHYSICAL REVIEW D   Vol. 90 ( 12 )   2014.12

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    DOI: 10.1103/PhysRevD.90.124061

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  102. Reconstruction of domain wall universe and localization of gravity Reviewed

    Higuchi Masafumi, Nojiri Shin'ichi

    GENERAL RELATIVITY AND GRAVITATION   Vol. 46 ( 11 )   2014.11

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    DOI: 10.1007/s10714-014-1822-z

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  103. Reconstruction of scalar field theories realizing inflation consistent with the Planck and BICEP2 results Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 737   page: 374-378   2014.10

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    DOI: 10.1016/j.physletb.2014.09.014

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  104. Renormalizable toy model of massive spin-two field and new bigravity Reviewed

    Ohara Yuichi, Akagi Satoshi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 90 ( 4 )   2014.8

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    DOI: 10.1103/PhysRevD.90.043006

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  105. Instabilities and anti-evaporation of Reissner-Nordstrom black holes in modified F(R) gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 735   page: 376-382   2014.7

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    DOI: 10.1016/j.physletb.2014.06.070

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  106. Cosmology and stability in scalar-tensor bigravity Reviewed

    Bamba Kazuharu, Kokusho Yusuke, Nojiri Shin'ichi, Shirai Norihito

    CLASSICAL AND QUANTUM GRAVITY   Vol. 31 ( 7 )   2014.4

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    DOI: 10.1088/0264-9381/31/7/075016

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  107. Trace-anomaly driven inflation in f (T) gravity and in minimal massive bigravity Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 731   page: 257-264   2014.4

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    DOI: 10.1016/j.physletb.2014.02.041

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  108. Possible antigravity regions in F (R) theory? Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D., Saez-Gomez Diego

    PHYSICS LETTERS B   Vol. 730   page: 136-140   2014.3

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    DOI: 10.1016/j.physletb.2014.01.045

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  109. Accelerating cosmology in modified gravity: From convenient F(R) or string-inspired theory to bimetric F(R) gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS   Vol. 11 ( 2 )   2014.2

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    DOI: 10.1142/S0219887814600068

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  110. Bounce cosmology from F(R) gravity and F(R) bigravity Reviewed

    Bamba Kazuharu, Makarenko Andrey N., Myagky Alexandr N., Nojiri Shin'ichi, Odintsov Sergei D.

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 1 )   2014.1

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    DOI: 10.1088/1475-7516/2014/01/008

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  111. New massive spin two model on curved space-time

    Satoshi Akagi, Yuichi Ohara, Shin'ichi Nojiri

    Phys.Rev. D90 (2014) 12, 123013     2014

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    DOI: 10.1103/PhysRevD.90.123013

  112. Inflationary universe from perfect fluid and F(R) gravity and its comparison with observational data

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Gómez

    Physical Review D 90, 124061 (2014     2014

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    DOI: 10.1103/PhysRevD.90.124061

  113. Mimetic F(R) gravity: inflation, dark energy and bounce

    Shin'ichi Nojiri, Sergei D. Odintsov

    Mod.Phys.Lett. A29 (2014) 40, 1450211     2014

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    DOI: 10.1142/S0217732314502113

  114. Reconstruction of scalar field theories realizing inflation consistent with the Planck and BICEP2 results

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Physics Letters B 737 (2014) 374-378     2014

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    DOI: 10.1016/j.physletb.2014.09.014

  115. Instabilities and Anti-Evaporation of Reissner-Nordström Black Holes in modified F(R) gravity

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett. B735 (2014) 376-382     2014

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    DOI: 10.1016/j.physletb.2014.06.070

  116. Renormalizable toy model of massive spin two field and new bigravity

    Yuichi Ohara, Satoshi Akagi, Shin'ichi Nojiri

    Phys. Rev. D 90, 043006 (2014)     2014

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    DOI: 10.1103/PhysRevD.90.043006

  117. Reconstruction of Domain Wall Universe and Localization of Gravity

    Masafumi Higuchi, Shin'ichi Nojiri

    Gen.Rel.Grav. 46 (2014) 11, 1822     2014

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    DOI: 10.1007/s10714-014-1822-z

  118. Trace-anomaly driven inflation in f(T) gravity and in minimal massive bigravity

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Physics Letters B 731 (2014) 257-264     2014

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    DOI: 10.1016/j.physletb.2014.02.041

  119. Possible antigravity regions in F(R) theory?

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov, Diego Sáez-Gómez

    Physics Letters B 730 (2014) 136-140     2014

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    DOI: 10.1016/j.physletb.2014.01.045

  120. Cosmology and Stability in Scalar-Tensor bigravity

    Kazuharu Bamba, Yusuke Kokusho, Shin'ichi Nojiri, Norihito Shirai

    Class.Quant.Grav. 31 (2014) 075016     2014

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    DOI: 10.1088/0264-9381/31/7/075016

  121. Cosmological investigations of (extended) nonlinear massive gravity schemes with non-minimal coupling

    K. Bamba, Md. Wali Hossain, R. Myrzakulov, S. Nojiri, M. Sami

    Phys. Rev. D 89, 083518 (2014)     2014

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    DOI: 10.1103/PhysRevD.89.083518

  122. Bounce cosmology from F(R) gravity and F(R) bigravity

    Kazuharu Bamba, Andrey N. Makarenko, Alexandr N. Myagky, Shin'ichi Nojiri, Sergei D. Odintsov

    JCAP01(2014)008     2014

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    DOI: 10.1088/1475-7516/2014/01/008

  123. Accelerating cosmology in modified gravity: from convenient F(R) or string-inspired theory to bimetric F(R) gravity

    Shin'Ichi Nojiri, Sergei D. Odintsov

    Int.J.Geom.Meth.Mod.Phys. 11 (2014) 1460006     2014

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    DOI: 10.1142/S0219887814600068

  124. Ghost-free F(R) bigravity and accelerating cosmology

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett. B716 (2014) 377-383     2014

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    DOI: 10.1016/j.physletb.2012.08.049

  125. New proposal for non-linear ghost-free massive F (R) gravity: Cosmic acceleration and Hamiltonian analysis Reviewed

    Kluson Josef, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 726 ( 4-5 ) page: 918-925   2013.11

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    DOI: 10.1016/j.physletb.2013.10.003

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  126. No further gravitational wave modes in F(T) gravity Reviewed

    Bamba Kazuharu, Capozziello Salvatore, De Laurentis Mariafelicia, Nojiri Shin'ichi, Saez-Gomez Diego

    PHYSICS LETTERS B   Vol. 727 ( 1-3 ) page: 194-198   2013.11

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    DOI: 10.1016/j.physletb.2013.10.022

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  127. Effective F(T) gravity from the higher-dimensional Kaluza-Klein and Randall-Sundrum theories Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 725 ( 4-5 ) page: 368-371   2013.10

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    DOI: 10.1016/j.physletb.2013.07.052

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  128. Phantom without ghost Reviewed

    Nojiri Shin'ichi, Saridakis Emmanuel N.

    ASTROPHYSICS AND SPACE SCIENCE   Vol. 347 ( 1 ) page: 221-226   2013.9

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    DOI: 10.1007/s10509-013-1509-z

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  129. Anti-evaporation of Schwarzschild-de Sitter black holes in F(R) gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    CLASSICAL AND QUANTUM GRAVITY   Vol. 30 ( 12 )   2013.6

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    DOI: 10.1088/0264-9381/30/12/125003

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  130. Noether current from surface term, Virasoro algebra, and black hole entropy in bigravity Reviewed

    Katsuragawa Taishi, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 87 ( 10 )   2013.5

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    DOI: 10.1103/PhysRevD.87.104032

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  131. Variety of cosmic acceleration models from massive F(R) bigravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Shirai Norihito

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 5 )   2013.5

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    DOI: 10.1088/1475-7516/2013/05/020

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  132. Scalar Domain Wall as the Universe Reviewed

    Yuta Toyozato, Kazuharu Bamba, Shin'ichi Nojiri

    Physical Review D   Vol. 87 ( 6 ) page: 063008   2013.3

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    We develop a formulation where, for an arbitrarily given warp factor, we construct a scalar field action which reproduces the warp factor as a solution of the Einstein equation and field equation corresponding to the action. This formulation could be called the reconstruction. By using the formulation of the reconstruction, we construct models which have an exact solution describing the domain wall. The shape of the domain wall can be flat, de Sitter space-time, or anti-de Sitter space-time. In the constructed domain wall solutions, there often appears a ghost with negative kinetic energy. We give, however, an example of the de Sitter domain wall solution without a ghost, which could be a toy model of inflation. We also investigate the localization of gravity as in the Randall-Sundrum model. It is demonstrated that the four-dimensional Newton law could be reproduced even in the de Sitter space-time domain wall solution. We show that we can construct a space-time, where the domain wall is the general Friedmann-Robertson-Walker universe and the warp factor can be arbitrary. For such a construction, we use two scalar fields. It is also illustrated that the scalar field equations are equivalent to the Bianchi identities.

    DOI: 10.1103/PhysRevD.87.063008

  133. Scalar domain wall as the universe Reviewed

    Toyozato Yuta, Bamba Kazuharu, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 87 ( 6 )   2013.3

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    DOI: 10.1103/PhysRevD.87.063008

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  134. Multiple ΛCDM cosmology with string landscape features and future singularities

    E. Elizalde, A.N. Makarenko, S. Nojiri, V.V. Obukhov, S.D. Odintsov

    Astrophys.Space Sci. 344 (2013) 479-488     2013

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    DOI: 10.1007/s10509-012-1339-4

  135. No further gravitational wave modes in F(T) gravity

    Kazuharu Bamba, Salvatore Capozziello, Mariafelicia De Laurentis, Shin'ichi Nojiri, Diego Sáez-Gómez

    Physics Letters B 727 (2013) 194-198     2013

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    DOI: 10.1016/j.physletb.2013.10.022

  136. New proposal for non-linear ghost-free massive F(R) gravity: cosmic acceleration and Hamiltonian analysis

    Josef Klusoň, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett. B726 (2013) 918-925     2013

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    DOI: 10.1016/j.physletb.2013.10.003

  137. Effective F(T) gravity from the higher-dimensional Kaluza-Klein and Randall-Sundrum theories

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Physics Letters B 725 (2013) 368-371     2013

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    DOI: 10.1016/j.physletb.2013.07.052

  138. Noether current from surface term, Virasoro algebra and black hole entropy in bigravity

    Taishi Katsuragawa, Shin'ichi Nojiri

    Phys. Rev. D 87 (2013) 104032     2013

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    DOI: 10.1103/PhysRevD.87.104032

  139. Anti-Evaporation of Schwarzschild-de Sitter Black Holes in F(R) gravity

    Shin'ichi Nojiri, Sergei D. Odintsov

    Class.Quant.Grav. 30 (2013) 125003     2013

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    DOI: 10.1088/0264-9381/30/12/125003

  140. Phantom without ghost

    Shin'ichi Nojiri, Emmanuel N. Saridakis

    Astrophysics and Space Science, Volume 347, Issue 1 , pp 221-226, 2013     2013

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    DOI: 10.1007/s10509-013-1509-z

  141. Variety of cosmic acceleration models from massive F(R) bigravity

    Shin'ichi Nojiri, Sergei D. Odintsov, Norihito Shirai

    JCAP 1305 (2013) 020     2013

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    DOI: 10.1088/1475-7516/2013/05/020

  142. Spontaneous symmetry breaking in cosmos: The hybrid symmetron as a dark energy switching device

    K. Bamba, R. Gannouji, M. Kamijo, S. Nojiri, M. Sami

    JCAP 1307 (2013) 017     2013

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    DOI: 10.1088/1475-7516/2013/07/017

  143. Classical dimensional transmutation and renormalization in massive lambda phi(4) model Reviewed

    Yoda Hiroshi, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 718 ( 2 ) page: 683-686   2012.12

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    DOI: 10.1016/j.physletb.2012.11.006

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  144. Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests Reviewed

    Bamba Kazuharu, Capozziello Salvatore, Nojiri Shin'ichi, Odintsov Sergei D.

    ASTROPHYSICS AND SPACE SCIENCE   Vol. 342 ( 1 ) page: 155-228   2012.11

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    DOI: 10.1007/s10509-012-1181-8

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  145. Ghost-free F(R) bigravity and accelerating cosmology Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 716 ( 2 ) page: 377-383   2012.9

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    DOI: 10.1016/j.physletb.2012.08.049

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  146. Stability of accelerating cosmology in two scalar-tensor theory: Little Rip versus de Sitter Reviewed

    Yusaku Ito, Shin'ichi Nojiri, Sergei D. Odintsov

    Entropy   Vol. 14 ( 8 ) page: 1578-1605   2012.8

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    We develop the general reconstruction scheme in two scalar model. The quintom-like theory which may describe (different) non-singular Little Rip or de Sitter cosmology is reconstructed. The number of scalar phantom dark energy models (with Little Rip cosmology or asymptotically de Sitter evolution) is presented. Stability issue of such dark energy cosmologies as well as the flow to fixed points are studied. The stability of Little Rip universe which leads to dissolution of bound objects sometime in future indicates that no classical transition to de Sitter space occurs. The possibility of unification of inflation with Little Rip dark energy in two scalar theory is briefly mentioned.

    DOI: 10.3390/e14081578

  147. Generalized Galileon model: Cosmological reconstruction and the Vainshtein mechanism Reviewed

    Shirai Norihito, Bamba Kazuharu, Kumekawa Shota, Matsumoto Jiro, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 86 ( 4 )   2012.8

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    DOI: 10.1103/PhysRevD.86.043006

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  148. Modified F(R) Horava-Lifshitz gravity: a way to accelerating FRW cosmology (vol 27, 185021, 2010) Reviewed

    Chaichian Masud, Nojiri Shin'ichi, Odintsov Sergei D., Oksanen Markku, Tureanu Anca

    CLASSICAL AND QUANTUM GRAVITY   Vol. 29 ( 15 )   2012.8

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    DOI: 10.1088/0264-9381/29/15/159501

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  149. Stability of Accelerating Cosmology in Two Scalar-Tensor Theory: Little Rip versus de Sitter Reviewed

    Ito Yusaku, Nojiri Shin'ichi, Odintsov Sergei D.

    ENTROPY   Vol. 14 ( 8 ) page: 1578-1605   2012.8

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    DOI: 10.3390/e14081578

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  150. Covariant gravity with Lagrange multiplier constraint Reviewed

    Shin'ichi Nojiri

    Int. J. Mod. Phys. Conf. Ser   Vol. 14   page: 450   2012.7

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    We review on the models of gravity with a constraint by the Lagrange multiplier field. The constraint breaks general covariance or Lorentz symmetry in the ultraviolet region. We report on the F(R) gravity model with the constraint and the proposal of the covariant (power-counting) renormalized gravity model by using the constraint and scalar projectors. We will show that the model admits flat space solution, its gauge-fixing formulation is fully developed, and the only propagating mode is (higher derivative) graviton, while scalar and vector modes do not propagate. The preliminary study of FRW cosmology indicates to the possibility of inflationary universe solution is also given.

    DOI: 10.1142/S201019451200757X

  151. Scalar dark energy models mimicking Lambda CDM with arbitrary future evolution Reviewed

    Astashenok Artyom V., Nojiri Shin'ichi, Odintsov Sergei D., Scherrer Robert J.

    PHYSICS LETTERS B   Vol. 713 ( 3 ) page: 145-153   2012.7

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    DOI: 10.1016/j.physletb.2012.06.017

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  152. Critical gravity with a scalar field in four dimensions Reviewed

    Hirochi Kyosuke, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 85 ( 12 )   2012.6

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    DOI: 10.1103/PhysRevD.85.127503

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  153. Modified first-order Horava-Lifshitz gravity: Hamiltonian analysis of the general theory and accelerating FRW cosmology in a power-law F(R) model (vol 82, 065020, 2010) Reviewed

    Carloni Sante, Chaichian Masud, Nojiri Shin'ichi, Odintsov Sergei D., Oksanen Markku, Tureanu Anca

    PHYSICAL REVIEW D   Vol. 85 ( 12 )   2012.6

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    DOI: 10.1103/PhysRevD.85.129904

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  154. Reconstruction of f(T) gravity: Rip cosmology, finite-time future singularities and thermodynamics Reviewed

    Kazuharu Bamba, Ratbay Myrzakulov, Shin'ichi Nojiri, Sergei D. Odintsov

    Physical Review D   Vol. 85 ( 10 ) page: 104036   2012.5

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    DOI: 10.1103/PhysRevD.85.104036

  155. Reconstruction of f(T) gravity: Rip cosmology, finite-time future singularities, and thermodynamics Reviewed

    Bamba Kazuharu, Myrzakulov Ratbay, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 85 ( 10 )   2012.5

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    DOI: 10.1103/PhysRevD.85.104036

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  156. Screening of cosmological constant for de Sitter Universe in non-local gravity, phantom-divide crossing and finite-time future singularities Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D., Sasaki Misao

    GENERAL RELATIVITY AND GRAVITATION   Vol. 44 ( 5 ) page: 1321-1356   2012.5

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    DOI: 10.1007/s10714-012-1342-7

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  157. Cosmological perturbations in k -essence model Reviewed

    Kazuharu Bamba, Jiro Matsumoto, Shin'ichi Nojiri

    Physical Review D   Vol. 85   2012.4

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    Subhorizon approximation is often used in cosmological perturbation theory. In this paper, however, it is shown that the subhorizon approximation is not always a good approximation at least in the case of the k-essence model. We also show that the sound speed given by the k-essence model exerts a huge influence on the time evolution of the matter density perturbation, and future observations could clarify the differences between the ΛCDM model and the k-essence model.

    DOI: 10.1103/PhysRevD.85.084026

  158. Cosmological perturbations in the k-essence model Reviewed

    Bamba Kazuharu, Matsumoto Jiro, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 85 ( 8 )   2012.4

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    DOI: 10.1103/PhysRevD.85.084026

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  159. Phantom cosmology without Big Rip singularity Reviewed

    Astashenok Artyom V., Nojiri Shin'ichi, Odintsov Sergei D., Yurov Artyom V.

    PHYSICS LETTERS B   Vol. 709 ( 4-5 ) page: 396-403   2012.3

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    DOI: 10.1016/j.physletb.2012.02.039

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  160. Stable phantom-divide crossing in two scalar models with matter Reviewed

    Rio Saitou, Shin'ichi Nojiri

    The European Physical Journal C   Vol. 72   page: 1946   2012.3

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    DOI: 10.1140/epjc/s10052-012-1946-9

  161. Phantom Cosmology without Big Rip Singularity Reviewed

    Artyom V. Astashenok, Shin'ichi Nojiri, Sergei D. Odintsov, Artyom V. Yurov

    Physics Letters B   Vol. 709 ( 4-5 ) page: 396-403   2012.3

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    DOI: 10.1016/j.physletb.2012.02.039

  162. Stable phantom-divide crossing in two-scalar models with matter Reviewed

    Saitou Rio, Nojiri Shin'ichi

    EUROPEAN PHYSICAL JOURNAL C   Vol. 72 ( 3 )   2012.3

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    DOI: 10.1140/epjc/s10052-012-1946-9

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  163. Models for little rip dark energy Reviewed

    Frampton Paul H., Ludwick Kevin J., Nojiri Shin'ichi, Odintsov Sergei D., Scherrer Robert J.

    PHYSICS LETTERS B   Vol. 708 ( 1-2 ) page: 204-211   2012.2

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    DOI: 10.1016/j.physletb.2012.01.048

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  164. Domain wall solution in F(R) gravity and variation of the fine structure constant Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 85 ( 4 )   2012.2

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    DOI: 10.1103/PhysRevD.85.044012

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  165. Models for Little Rip Dark Energy Reviewed

    Paul H. Frampton, Kevin J. Ludwick, Shin'ichi Nojiri, Sergei D. Odintsov, Robert J. Scherrer

    Phys.Lett.   Vol. B708   2012

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    We examine in more detail specific models which yield a little rip cosmology, i.e., a universe in which the dark energy density increases without bound but the universe never reaches a finite-time singularity. We derive the conditions for the little rip in terms of the inertial force in the expanding universe and present two representative models to illustrate in more detail the difference between little rip models and those which are asymptotically de Sitter. We derive conditions on the equation of state parameter of the dark energy to distinguish between the two types of models. We show that coupling between dark matter and dark energy with a little rip equation of state can alter the evolution, changing the little rip into an asymptotic de Sitter expansion. We give conditions on minimally-coupled phantom scalar field models and on scalar-tensor models that indicate whether or not they correspond to a little rip expansion. We show that, counterintuitively, despite local instability, a little-rip cosmology has an infinite lifetime.

    DOI: 10.1016/j.physletb.2012.01.048

  166. Domain wall solution in F(R) gravity and variation of the fine structure constant Reviewed

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D85   2012

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    We construct a domain wall solution in F(R) gravity. We reconstruct a static domain wall solution in a scalar field theory. We also reconstruct an explicit F(R) gravity model in which a static domain wall solution can be realized. Moreover, we show that there could exist an effective (gravitational) domain wall in the framework of F(R) gravity. In addition, it is demonstrated that a logarithmic non-minimal gravitational coupling of the electromagnetic theory in F(R) gravity may produce time-variation of the fine structure constant which may increase with decrease of the curvature, and that this model would be ruled out by the constraints on the time variation of the fine structure constant from quasar absorption lines. We also present cosmological consequences of the coupling of the electromagnetic field to a scalar field as well as the scalar curvature and discuss the relation between variation of the fine structure constant and the breaking of the conformal invariance of the electromagnetic field.

    DOI: 10.1103/PhysRevD.85.044012

  167. Scalar dark energy models mimicking ΛCDM with arbitrary future evolution Reviewed

    Artyom V. Astashenok, Shin'ichi Nojiri, Sergei D. Odintsov, Robert J. Scherrer

    Phys.Lett. B   Vol. 713   page: 145-153   2012

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    energy models with various scenarios of evolution are considered from the viewpoint of the formalism for the equation of state. It is shown that these models are compatible with current astronomical data. Some of the models presented here evolve arbitrarily close to ΛCDM up to the present, but diverge in the future into a number of different possible asymptotic states, including asymptotic de-Sitter (pseudo-rip) evolution, little rips with disintegration of bound structures, and various forms of finite-time future singularities. Therefore it is impossible from observational data to determine whether the universe will end in a future singularity or not. We demonstrate that the models under consideration are stable for a long period of time (billions of years) before entering a Little Rip/Pseudo-Rip induced dissolution of bound structures or before entering a soft finite-time future singularity. Finally, the physical consequences of Little Rip, Type II, III and Big Crush singularities are briefly compared.

    DOI: 10.1016/j.physletb.2012.06.017

  168. Turbulence and Little Rip Cosmology

    I. Brevik, R. Myrzakulov, S. Nojiri, S. D. Odintsov

    Phys.Rev. D86 (2012) 063007     2012

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    DOI: 10.1103/PhysRevD.86.063007

  169. Classical Dimensional Transmutation and Renormalization in Massive lambda phi^4 Model

    Hiroshi Yoda, Shin'ichi Nojiri

    Phys.Lett. B718 (2012) 683-686     2012

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    DOI: 10.1016/j.physletb.2012.11.006

  170. Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests

    Kazuharu Bamba, Salvatore Capozziello, Shin'ichi Nojiri, Sergei D. Odintsov

    Astrophysics and Space Science (2012) 342:155-228     2012

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    DOI: 10.1007/s10509-012-1181-8

  171. Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --

    Norihito Shirai, Kazuharu Bamba, Shota Kumekawa, Jiro Matsumoto, Shin'ichi Nojiri

    Phys.Rev. D86 (2012) 043006     2012

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    DOI: 10.1103/PhysRevD.86.043006

  172. Critical gravity with a scalar field in four dimensions

    Kyosuke Hirochi, Shin'ichi Nojiri

    Phys.Rev. D85 (2012)     page: 127503   2012

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    DOI: 10.1103/PhysRevD.85.127503

  173. Cyclic, ekpyrotic and little rip universe in modified gravity Reviewed

    Nojiri Shin'ichi, Odintsov S. D., Saez-Gomez D.

    TOWARDS NEW PARADIGMS: PROCEEDING OF THE SPANISH RELATIVITY MEETING 2011   Vol. 1458   page: 207-221   2012

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    DOI: 10.1063/1.4734414

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  174. Could the dynamical Lorentz symmetry breaking induce the superluminal neutrinos? Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Eur.Phys.J.   Vol. C71   page: 1801   2011.11

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  175. Could dynamical Lorentz symmetry breaking induce the superluminal neutrinos? Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    EUROPEAN PHYSICAL JOURNAL C   Vol. 71 ( 11 )   2011.11

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    DOI: 10.1140/epjc/s10052-011-1801-4

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  176. Spinor with Schrodinger symmetry and non-relativistic supersymmetry Reviewed

    Yoda Hiroshi, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 702 ( 1 ) page: 69-74   2011.8

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    DOI: 10.1016/j.physletb.2011.06.048

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  177. The unification of inflation and late-time acceleration in the frame of k-essence Reviewed

    Saitou Rio, Nojiri Shin'ichi

    EUROPEAN PHYSICAL JOURNAL C   Vol. 71 ( 8 )   2011.8

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    DOI: 10.1140/epjc/s10052-011-1712-4

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  178. f(R, T) gravity Reviewed

    Harko Tiberiu, Lobo Francisco S. N., Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 84 ( 2 )   2011.7

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    DOI: 10.1103/PhysRevD.84.024020

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  179. On isotropic turbulence in the dark fluid universe Reviewed

    Brevik Iver, Gorbunova Olesya, Nojiri Shin'ichi, Odintsov Sergei D.

    EUROPEAN PHYSICAL JOURNAL C   Vol. 71 ( 4 )   2011.4

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    DOI: 10.1140/epjc/s10052-011-1629-y

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  180. Screening of cosmological constant in non-local gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Sasaki Misao, Zhang Ying-li

    PHYSICS LETTERS B   Vol. 696 ( 3 ) page: 278-282   2011.1

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    DOI: 10.1016/j.physletb.2010.12.035

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  181. Viscous Little Rip Cosmology Reviewed

    I. Brevik, E. Elizalde, S. Nojiri, S.D. Odintsov

    Phys.Rev.   Vol. D84   page: 103508   2011

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    Dark energy of phantom or quintessence nature with an equation of state parameter $w$ almost equal to -1 often leads the universe evolution to a finite-time future singularity. An elegant solution to this problem has been recently proposed \cite{frampton11} under the form of the so-called Little Rip cosmology which appears to be a realistic alternative to the $\Lambda$CDM model. A viscous Little Rip cosmology is here proposed. Whereas generically bulk viscosity tends to promote the Big Rip, we find that there are a number of situations where this is not the case and where the formalism nicely adjusts itself to the Little Rip scenario. We prove, in particular, that a viscous fluid (or, equivalently, one with an inhomogeneous (imperfect) equation of state) is perfectly able to produce a Little Rip cosmology as a purely viscosity effect. The possibility of its induction as a combined result of viscosity and a general (power-like) equation of state is also investigated in detail. To finish, a physical, inertial force interpretation of the dissolution of bound structures in the Little Rip cosmology is presented.

  182. Spinor with Schr\" odinger symmetry and non-relativistic supersymmetry Reviewed

    Hiroshi Yoda, Shin'ichi Nojiri

    Phys.Lett.   Vol. B702   page: 69-74   2011

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    We construct the $d$ dimensional "half" Schr\"odinger equation, which is a kind of the root of the Schr\"odinger equation, from the $d+1$ dimensional free Dirac equation. The solution of the "half" Schr\"odinger equation also satisfies the usual free Schr\"odinger equation. We also find that the explicit transformation laws of the Schr\"odinger and the half Schr\"odinger fields under the Schr\"odinger symmetry transformation are derived by starting from the Klein-Gordon equation and the Dirac equation in $d+1$ dimensions. We derive the 3 and 4 dimensional super-Schr\"odinger algebra from the superconformal algebra in 4 and 5 dimensions. The algebra is realized by introducing two complex scalar and one complex) spinor fields and the explicit transformation properties have been found.

  183. Covariant Lagrange multiplier constrained higher derivative gravity with scalar projectors Reviewed

    Josef Kluson, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B701   page: 117-126   2011

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    We formulate higher derivative gravity with Lagrange multiplier constraint and scalar projectors. Its gauge-fixed formulation as well as vector fields formulation is developed and corresponding spontaneous Lorentz symmetry breaking is investigated. We show that the only propagating mode is higher derivative graviton while scalar and vector modes do not propagate. Despite to higher derivatives structure of the action, its first FRW equation is the first order differential equation which admits the inflationary universe solution.

    DOI: 10.1016/j.physletb.2011.05.025

  184. f(R,T) gravity Reviewed

    Tiberiu Harko, Francisco S.N. Lobo, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D84   page: 024020,2011   2011

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    We consider f(R,T) modified theories of gravity, where the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar R and of the trace of the stress-energy tensor T. We obtain the gravitational field equations in the metric formalism, as well as the equations of motion for test particles, which follow from the covariant divergence of the stress-energy tensor. Generally, the gravitational field equations depend on the nature of the matter source. The field equations of several particular models, corresponding to some explicit forms of the function f(R,T), are also presented. An important case, which is analyzed in detail, is represented by scalar field models. We write down the action and briefly consider the cosmological implications of the $f(R,T^{\phi})$ models, where $T^{\phi}$ is the trace of the stress-energy tensor of a self-interacting scalar field. The equations of motion of the test particles are also obtained from a variational principle. The motion of massive test particles is non-geodesic, and takes place in the presence of an extra force orthogonal to the four-velocity. The Newtonian limit of the equation of motion is further analyzed. Finally, we provide a constraint on the magnitude of the extra-acceleration by analyzing the perihelion precession of the planet Mercury in the framework of the present model.

    DOI: 10.1103/PhysRevD.84.024020

  185. The unification of inflation and late-time acceleration in the frame of $k$-essence Reviewed

    Rio Saitou, Shin'ichi Nojiri

    Eur.Phys.J.   Vol. C71   page: 1712   2011

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    By using the formulation of the reconstruction, we explicitly construct models of $k$-essence, which unify the inflation in the early universe and the late accelerating expansion of the present universe by a single scalar field. Due to the higher derivative terms, the solution describing the unification can be stable in the space of solutions, which makes the restriction for the initial condition relaxed. The higher derivative terms also eliminate tachyon. Therefore we can construct a model describing the time development, which cannot be realized by a usual inflaton or quintessence models of the canonical scalar field due to the instability or the existence of tachyon. We also propose a mechanism of the reheating by the quantum effects coming from the variation of the energy density of the scalar field.

  186. Time-dependent matter instability and star singularity in F(R) gravity Reviewed

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B698   page: 451-456   2011

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    We investigate a curvature singularity appearing in the star collapse process in $F(R)$ gravity. In particular, we propose an understanding of the mechanism to produce the curvature singularity. Moreover, we explicitly demonstrate that $R^\alpha$ ($1 < \alpha \leq 2$) term addition could cure the curvature singularity and viable $F(R)$ gravity models could become free of such a singularity. Furthermore, we discuss the realization process of the curvature singularity and estimate the time scale of its appearance. For exponential gravity, it is shown that in case of the star collapse, the time scale is much shorter than the age of the universe, whereas in cosmological circumstances, it is as long as the cosmological time.

    DOI: 10.1016/j.physletb.2011.03.038

  187. Non-singular exponential gravity: a simple theory for early- and late-time accelerated expansion Reviewed

    E. Elizalde, S. Nojiri, S.D. Odintsov, L. Sebastiani, S. Zerbini

    Phys.Rev.   Vol. D83   page: 086006   2011

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    A theory of exponential modified gravity which explains both early-time inflation and late-time acceleration, in a unified way, is proposed. The theory successfully passes the local tests and fulfills the cosmological bounds and, remarkably, the corresponding inflationary era is proven to be unstable. Numerical investigation of its late-time evolution leads to the conclusion that the corresponding dark energy epoch is not distinguishable from the one for the $\Lambda$CDM model. Several versions of this exponential gravity, sharing similar properties, are formulated. It is also shown that this theory is non-singular, being protected against the formation of finite-time future singularities. As a result, the corresponding future universe evolution asymptotically tends, in a smooth way, to de Sitter space, which turns out to be the final attractor of the system.

    DOI: 10.1103/PhysRevD.83.086006

  188. U(1) Invariant F(R) Horava-Lifshitz Gravity Reviewed

    Josef Kluson, Shin'ichi Nojiri, Sergei D. Odintsov, Diego Saez-Gomez

    Eur.Phys.J.   Vol. C71   page: 1690   2011

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    This paper is devoted to the study of various aspects of projectable F(R) Horava-Lifshitz (HL) gravity. We show that some versions of F(R) HL gravity may have stable de Sitter solution and instable flat space solution. In this case, the problem of scalar graviton does not appear because flat space is not vacuum state. Generalizing the U(1) HL theory proposed in arXiv:1007.2410, we formulate U(1) extension of scalar theory and of F(R) Horava-Lifshitz gravity. The Hamiltonian approach for such the theory is developed in full detail. It is demonstrated that its Hamiltonian structure is the same as for the non-relativistic covariant HL gravity. The spectrum analysis performed around flat background indicates towards the consistency of the theory because it contains graviton with only transverse polarization. Finally, we analyze the spatially-flat FRW equations for U(1) invariant F(R) Horava-Lifshitz gravity.

    DOI: 10.1140/epjc/s10052-011-1690-6

  189. On Isotropic Turbulence in the Dark Fluid Universe Reviewed

    Iver Brevik, Olesya Gorbunova, Shin'ichi Nojiri, Sergei D. Odintsov

    Eur.Phys.J.   Vol. C71   page: 1629   2011

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    As first part of this work, experimental information about the decay of isotropic turbulence in ordinary hydrodynamics, u^2(t) proportional to t^{-6/5}, is used as input in FRW equations in order to investigate how an initial fraction f of turbulent kinetic energy in the cosmic fluid influences the cosmological development in the late, quintessence/phantom, universe. First order perturbative theory to the first order in f is employed. It turns out that both in the Hubble factor, and in the energy density, the influence from the turbulence fades away at late times. The divergences in these quantities near the Big Rip behave essentially as in a non-turbulent fluid. However, for the scale factor, the turbulence modification turns out to diverge logarithmically. As second part of our work, we consider the full FRW equation in which the turbulent part of the dark energy is accounted for by a separate term. It is demonstrated that turbulence occurrence may change the future universe evolution due to dissipation of dark energy. For instance, phantom-dominated universe becomes asymptotically a de Sitter one in the future, thus avoiding the Big Rip singularity.

    DOI: 10.1140/epjc/s10052-011-1629-y

  190. Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rept.   Vol. 505   page: 59-144   2011

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    Classical generalization of general relativity is considered as gravitational alternative for unified description of the early-time inflation with late-time cosmic acceleration. The structure and cosmological properties of number of modified theories, including traditional $F(R)$ and Ho\v{r}ava-Lifshitz $F(R)$ gravity, scalar-tensor theory, string-inspired and Gauss-Bonnet theory, non-local gravity, non-minimally coupled models, and power-counting renormalizable covariant gravity are discussed. Different representations and relations between such theories are investigated. It is shown that some versions of above theories may be consistent with local tests and may provide qualitatively reasonable unified description of inflation with dark energy epoch. The cosmological reconstruction of different modified gravities is made in great detail. It is demonstrated that eventually any given universe evolution may be reconstructed for the theories under consideration: the explicit reconstruction is applied to accelerating spatially-flat FRW universe. Special attention is paid to Lagrange multiplier constrained and conventional $F(R)$ gravities, for last theory the effective $\Lambda$CDM era and phantom-divide crossing acceleration are obtained. The occurrence of Big Rip and other finite-time future singularities in modified gravity is reviewed as well as its curing via the addition of higher-derivative gravitational invariants.

    DOI: 10.1016/j.physrep.2011.04.001

  191. Screening of cosmological constant in non-local gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Misao Sasaki, Ying-li Zhang

    Phys.Lett.   Vol. B696   page: 278-282   2011

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    We discuss a possible mechanism to screen a cosmological constant in non-local gravity. We find that in a simple model of of non-local gravity with the Lagrangian of the form, $R+f(\Box^{-1}R)-2\Lambda$ where $f(X)$ is a quadratic function of $X$, there is a flat spacetime solution despite the presence of the cosmological constant $\Lambda$. Unfortunately, however, we also find that this solution contains a ghost in general. Then we discuss the condition to avoid a ghost and find that one can avoid it only for a finite range of `time'. Nevertheless our result suggests the possibility of solving the cosmological constant problem in the context of non-local gravity.

    DOI: 10.1016/j.physletb.2010.12.035

  192. Covariant power-counting renormalizable gravity: Lorentz symmetry breaking and accelerating early-time FRW universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D83   page: 023001   2011

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    We continue the study of covariant power-counting renormalizable gravity constrained by scalar Lagrange multiplier. Lorentz symmetry breaking is investigated in such a theory in comparison with the one in ghost condensation model. Covariant power-counting renormalizable vector gravity which is invariant under $U(1)$ gauge symmetry is proposed. Several forms of vector Lagrange multiplier in this theory are discussed. It is shown that covariant scalar/vector gravity under consideration may have power-law or de Sitter accelerating cosmological solution corresponding to inflationary era. Simplest black hole solution is obtained and dispersion relations for graviton are presented.

    DOI: 10.1103/PhysRevD.83.023001

  193. Non-Singular Modified Gravity Unifying Inflation with Late-Time Acceleration and Universality of Viscous Ratio Bound in F(R) Theory Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT   ( 190 ) page: 155-178   2011

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  194. Towards the unification of late-time acceleration and inflation by k-essence model Reviewed

    Nojiri Shin'ichi

    COSMOLOGY, QUANTUM VACUUM AND ZETA FUNCTIONS: IN HONOR OF EMILIO ELIZALDE   Vol. 137   page: 237-246   2011

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  195. Cardy-Verlinde formula in FRW Universe with inhomogeneous generalized fluid and dynamical entropy bounds near the future singularity Reviewed

    Brevik Iver, Nojiri Shin'ichi, Odintsov Sergei D., Saez-Gomez Diego

    EUROPEAN PHYSICAL JOURNAL C   Vol. 69 ( 3-4 ) page: 563-574   2010.10

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    DOI: 10.1140/epjc/s10052-010-1425-0

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  196. Dark energy from modified gravity with Lagrange multipliers Reviewed

    Capozziello Salvatore, Matsumoto Jiro, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 693 ( 2 ) page: 198-208   2010.9

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    DOI: 10.1016/j.physletb.2010.08.030

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  197. Modified first-order Horava-Lifshitz gravity: Hamiltonian analysis of the general theory and accelerating FRW cosmology in a power-law F(R) model Reviewed

    Carloni Sante, Chaichian Masud, Nojiri Shin'ichi, Odintsov Sergei D., Oksanen Markku, Tureanu Anca

    PHYSICAL REVIEW D   Vol. 82 ( 6 )   2010.9

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    DOI: 10.1103/PhysRevD.82.065020

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  198. Modified F(R) Horava-Lifshitz gravity: a way to accelerating FRW cosmology Reviewed

    Chaichian Masud, Nojiri Shin'ichi, Odintsov Sergei D., Oksanen Markku, Tureanu Anca

    CLASSICAL AND QUANTUM GRAVITY   Vol. 27 ( 18 )   2010.9

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    DOI: 10.1088/0264-9381/27/18/185021

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  199. A proposal for covariant renormalizable field theory of gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 691 ( 1 ) page: 60-64   2010.7

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    DOI: 10.1016/j.physletb.2010.06.007

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  200. CROSSING OF PHANTOM DIVIDE IN F(R) GRAVITY Reviewed

    Bamba Kazuharu, Geng Chao-Qiang, Nojiri Shin'ichi, Odintsov Sergei D.

    MODERN PHYSICS LETTERS A   Vol. 25 ( 11-12 ) page: 900-908   2010.4

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    DOI: 10.1142/S0217732310000058

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  201. INVERSE PROBLEM - RECONSTRUCTION OF DARK ENERGY MODELS Reviewed

    Nojiri Shin'ichi

    MODERN PHYSICS LETTERS A   Vol. 25 ( 11-12 ) page: 859-873   2010.4

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    DOI: 10.1142/S0217732310000022

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  202. Reconstruction of k-essence model Reviewed

    Matsumoto Jiro, Nojiri Shin'ichi

    PHYSICS LETTERS B   Vol. 687 ( 2-3 ) page: 236-242   2010.4

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    DOI: 10.1016/j.physletb.2010.03.030

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  203. Is the future universe singular: Dark matter versus modified gravity? Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 686 ( 1 ) page: 44-48   2010.3

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    DOI: 10.1016/j.physletb.2010.02.017

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  204. Equivalence of the modified gravity equation to the Clausius relation Reviewed

    Bamba Kazuharu, Geng Chao-Qiang, Nojiri Shin'ichi, Odintsov Sergei D.

    EPL   Vol. 89 ( 5 )   2010.3

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    DOI: 10.1209/0295-5075/89/50003

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  205. Covariant renormalizable gravity and its FRW cosmology Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 81 ( 4 )   2010.2

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    DOI: 10.1103/PhysRevD.81.043001

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  206. Covariant renormalizable gravity and its FRW cosmology Reviewed

    S. Nojiri, S.D. Odintsov

    Phys.Rev.   Vol. D 81   page: 43001   2010

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    We consider the diffeomorphism invariant gravity coupled with the ideal fluid in the non-standard way. The Lorentz-invariance of the graviton propagator in such a theory considered as perturbation over flat background turns out to be broken due to non-standard coupling with the ideal fluid. As a result the behavior of the propagator in the ultraviolet/infrared region indicates that some versions of such theory are (super-)renormalizable ones (with appearance of only physical transverse modes). The FRW cosmology in same cases may be different from the one in General Relativity with the possible quintessence/phantom-like inflationary stage.

  207. Vacuum energy fluctuations, the induced cosmological constant and cosmological reconstruction in non-minimal modified gravity models Reviewed

    G. Cognola, E. Elizalde, S. Nojiri, S.D. Odintsov

    Open Astron.J.   Vol. 3   page: 20-29   2010

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    The one-loop effective action for non-minimal scalar modified gravity on de Sitter background with a constant scalar field is found. The corresponding induced cosmological constant is evaluated. It is shown that quantum effects in non-minimal modified gravity may induce an early-time de Sitter universe even in the situation when such solution does not occur on the classical level. Classical reconstruction of the theory is presented in such a way that the resulting theory has a cosmological solution unifying early-time inflation with late-time acceleration.

  208. Dark energy from modified gravity with Lagrange multipliers Reviewed

    S. Capozziello, J. Matsumoto, S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B693   page: 198-208   2010

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    We study scalar-tensor theory, k-essence and modified gravity with Lagrange multiplier constraint which role is to reduce the number of degrees of freedom. Dark Energy cosmology of different types (Lambda CDM, unified inflation with DE, smooth non-phantom/phantom transition epoch) is reconstructed in such models. It is shown that mathematical equivalence between scalar theory and F(R) gravity is broken due to presence of constraint. The cosmological dynamics of F(R) gravity is modified by the second F_2(R) function dictated by the constraint. Dark Energy cosmology is defined by this function while standard F_1(R) function is relevant for local tests (modification of newton regime). A general discussion on the role of Lagrange multipliers to make higher-derivative gravity canonical is developed.

  209. A proposal for covariant renormalizable field theory of gravity Reviewed

    S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B691   page: 60-64   2010

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    The class of covariant gravity theories which have nice ultraviolet behavior and seem to be (super)-renormalizable is proposed. The apparent breaking of Lorentz invariance occurs due to the coupling with the effective fluid which is induced by Lagrange multiplier constrained scalar field. Spatially-flat FRW cosmology for such covariant field gravity may have accelerating solutions. Renormalizable versions of more complicated modified gravity which depends on Riemann and Ricci tensor squared may be constructed in the same way.

  210. Modified first-order Horava-Lifshitz gravity: Hamiltonian analysis of the general theory and accelerating FRW cosmology in power-law F(R) model Reviewed

    S. Carloni, M. Chaichian, S. Nojiri, S.D. Odintsov, M. Oksanen, A. Tureanu

    Phys.Rev.   Vol. D82   page: 065020   2010

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    We propose the most general modified first-order Horava-Lifshitz (HL) gravity, whose action does not contain time derivatives higher than the second order. The Hamiltonian structure of this theory is studied in all the details in the case of the spatially-flat FRW space-time, demonstrating many of the features of the general theory. It is shown that, with some plausible assumptions, including the projectability of the lapse function, this model is consistent. As a large class of such theories, the modified HL $F(R)$ gravity is introduced. The study of its ultraviolet properties shows that its z=3 version seems to be renormalizable in the same way as the original HL proposal. The Hamiltonian analysis of the modified HL F(R) gravity shows that it is in general a consistent theory. The F(R) gravity action is also studied in the fixed-gauge form, where the appearance of a scalar field is particularly illustrative. Then the spatially-flat FRW cosmology for this $F(R)$ gravity is investigated. It is shown that a special choice of parameters for this theory leads to the same equations of motion as in the case of traditional F(R) gravity. Nevertheless, the cosmological structure of the modified HL F(R) gravity turns out to be much richer than for its traditional counterpart. The emergence of multiple de Sitter solutions indicates to the possibility of unification of early-time inflation with late-time acceleration within the same model. Power-law F(R) theories are investigated in detail. It is analytically shown that they have a quite rich cosmological structure: early/late-time cosmic acceleration of quintessence, as well as of phantom types. Also it is demonstrated that all the four known types of finite-time future singularities may occur in the power-law HL F(R) gravity. Finally, a covariant proposal for (renormalizable) F(R) gravity within the HL spirit is presented.

  211. Crossing of Phantom Divide in F(R) Gravity Reviewed

    K. Bamba, C.-Q. Geng, S. Nojiri, S.D. Odintsov

    Mod.Phys.Lett.   Vol. A25   page: 900-908   2010

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    An explicit model of F(R) gravity with realizing a crossing of the phantom divide is reconstructed. In particular, it is shown that the Big Rip singularity may appear in the reconstructed model of F(R) gravity. Such a Big Rip singularity could be avoided by adding R^2 term or non-singular viable F(R) theory to the model because phantom behavior becomes transient.

  212. Cardy-Verlinde formula in FRW Universe with inhomogeneous generalized fluid and dynamical entropy bounds near the future singularity Reviewed

    I. Brevik, S. Nojiri, S.D. Odintsov, D. Saez-Gomez

    Eur.Phys.J.   Vol. C69   page: 563   2010

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    We derive a Cardy-Verlinde-like formula which relates the entropy of the closed FRW universe to its energy, and Casimir energy, for a multicomponent coupled fluid. The generalized fluid obeys an inhomogeneous equation of state. A viscous dark fluid is included, and we include also modified gravity using its fluid representation. It is demonstrated how such an expression reduces to the standard Cardy-Verlinde formula corresponding to the 2d CFT entropy only in some special cases. The dynamical entropy bound for a closed FRW universe with dark components is obtained. The universality of the dynamical entropy bound near a future singularity (of all four types), as well as near the Big Bang singularity, is investigated. It is demonstrated that except from some special cases of Type II and Type IV singularities the dynamical entropy bound is violated near the singularity even if quantum effects are taken into account. The dynamical entropy bound seems to be universal for the case of a regular universe, including the asymptotic de Sitter one.

  213. Modified F(R) Horava-Lifshitz gravity: a way to accelerating FRW cosmology Reviewed

    M. Chaichian, S. Nojiri, S.D. Odintsov, M. Oksanen, A. Tureanu

    Class.Quant.Grav.   Vol. 27   page: 185021   2010

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    We propose a general approach for the construction of modified gravity which is invariant under foliation-preserving diffeomorphisms. Special attention is paid to the formulation of modified F(R) Horava-Lifshitz gravity (FRHL), whose Hamiltonian structure is studied. It is demonstrated that the spatially-flat FRW equations of FRHL are consistent with the constraint equations. The analysis of de Sitter solutions for several versions of FRHL indicates that the unification of the early-time inflation with the late-time acceleration is possible. It is shown that a special choice of parameters for FRHL leads to the same spatially-flat FRW equations as in the case of traditional $F(R)$-gravity. Finally, an essentially most general modified Ho\v{r}ava-Lifshitz gravity is proposed, motivated by its fully diffeomorphism-invariant counterpart, with the restriction that the action does not contain derivatives higher than the second order with respect to the time coordinate.

  214. Reconstruction of k-essence model Reviewed

    J. Matsumoto, S. Nojiri

    Phys.Lett.   Vol. B687   page: 236-242   2010

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    We explicitly construct the k-essence models which reproduce the arbitrary FRW cosmology, that is, the arbitrary time-development of the scale factor or the Hubble rate. The k-essence model includes scalar quintessence model, tachyon dark energy model, ghost condensation model as special cases. Explicit formulas of the reconstruction are given. First we consider the case that the action only contains the kinetic term. In this case, we find that the model reproducing the development of the universe in the exact Lambda CDM model cannot be constructed although there is a model which reproduces the development infinitely closing to Lambda CDM model. We find, however, the solution is not stable. Another is more general case including potential etc., where we find that there appear infinite number of arbitrary functions of the scalar fields, which are redundant to the time development of the scale factor. By adjusting one of the redundant functions, however, we can obtain the model where any solution we need could be stable.

  215. Inverse problem: Reconstruction of dark energy models Reviewed

    S. Nojiri

    Mod.Phys.Lett.   Vol. A25   page: 859-873   2010

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    We review how we can construct the gravity models which reproduces the arbitrary development of the universe. We consider the reconstruction in the Einstein gravity coupled with generalized perfect fluid, scalar-Einstein gravity, scalar-Einstein-Gauss-Bonnet gravity, Einstein-F(G)-gravity, and F(R)-gravity. Very explicit formulas are given to reconstruct the models, which could be used when we find the detailed data of the development of the universe by future observations. Especially we find the formulas using e-foldings, which has a direct relation with observed redshift. As long as we observe the time development of the Hubble rate H, there exists a variety of models describing the arbitrary development of universe.

  216. Reconstruction and deceleration-acceleration transitions in modified gravity Reviewed

    S. Nojiri, S.D. Odintsov, A. Toporensky, P. Tretyakov

    Gen.Rel.Grav.   Vol. 42   page: 1997-2008   2010

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    We discuss the cosmological reconstruction in modified Gauss-Bonnet and F(R) gravities. Two alternative representations of the action (with and without auxiliary scalar) are considered. The approximate description of deceleration-acceleration transition cosmologies is reconstructed. It is shown that cosmological solution containing Big Bang and Big Rip singularities may be reconstructed only using the representation with the auxiliary field. The analytical description of the deceleration-acceleration transition cosmology in modified Gauss-Bonnet gravity is demonstrated to be impossible at sufficiently general conditions.

  217. Is the future universe singular: Dark Matter versus modified gravity? Reviewed

    S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B686   page: 44-48   2010

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    The fundamental problem of the occurrence/removal of finite-time future singularity in the universe evolution for coupled dark energy (DE) is addressed. It is demonstrated the existence of the (instable or local minimum) de Sitter space solution which may cure the Type II or Type IV future singularity for DE coupled with DM as the result of tuning the initial conditions. In case of phantom DE, the corresponding coupling may help to resolve the coincidence problem but not the Big Rip (Type I) singularity issue. We show that modified gravity of special form or inhomogeneous DE fluid may offer the universal scenario to cure the Type I,II,III or IV future singularity of coupled (fluid or scalar) DE evolution.

  218. PPN limit and cosmological gravitational waves as tools to constrain f(R)-gravity Reviewed

    M. De Laurentis, S. Capozziello, S. Nojiri, Sergei Odintsov

    Annalen Phys.   Vol. 19   page: 347-350   2010

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    We discuss the PPN Solar-System constraints and the GW stochastic background considering some recently proposed f(R) gravity models which satisfy both cosmological and stability conditions. Using the definition of PPN-parameters gamma and beta in terms of f(R)-models and the definition of scalar GWs, we compare and discuss if it is possible to search for parameter ranges of f(R)-models working at Solar System and GW stochastic background scale.

  219. Non-singular modified gravity: The Unification of the inflation, dark energy and dark mater Reviewed

    S. Nojiri, S.D. Odintsov

    AIP Conf.Proc.   Vol. 1241   page: 1094-1099   2010

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    Using the fluid representation, we formulate the conditions for the appearance of all four types finite-time future singularity in modified gravity in accelerating FRW universe. It stressed that number of standard quintessence/phantom DE theories (including scalar, fluid, DBI ones, etc) brings the accelerating cosmology to future singularity precisely in the same way as singular modified gravity DE. The viable non-singular modified gravity unifying the early-time inflation with late-time acceleration is considered. It is shown that adding such non-singular theory to another realistic singular modified gravity which has the accelerating solution with future singularity may cure the singularity of resulting combined model. This universal scenario may be naturally applied to standard singular DE models as well as to inflationary theories with initial singularity. This suggests the additional fundamental reasoning for modification of General Relativity.

  220. Equivalence of modified gravity equation to the Clausius relation Reviewed

    K. Bamba, C.-Q. Geng, S. Nojiri, S.D. Odintsov

    Europhys.Lett.   Vol. 89   page: 50003   2010

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    We explicitly show that the equations of motion for modified gravity theories of F(R)-gravity, the scalar-Gauss-Bonnet gravity, F(G)-gravity and the non-local gravity are equivalent to the Clausius relation in thermodynamics. In addition, we discuss the relation between the expression of the entropy and the contribution from the modified gravity as well as the matter to the definition of the energy flux (heat).

  221. Unifying inflation with dark energy in modified F(R) Horava-Lifshitz gravity Reviewed

    E. Elizalde, S. Nojiri, S. D. Odintsov, D. Saez-Gomez

    Eur.Phys.J.   Vol. C70   page: 351-361   2010

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    We study FRW cosmology for a non-linear modified F(R) Horava-Lifshitz gravity which has a viable convenient counterpart. A unified description of early-time inflation and late-time acceleration is possible in this theory, but the cosmological dynamic details are generically different from the ones of the convenient viable F(R) model. Remarkably, for some specific choice of parameters they do coincide. The emergence of finite-time future singularities is investigated in detail. It is shown that these singularities can be cured by adding an extra, higher-derivative term, which turns out to be qualitatively different when compared with the corresponding one of the convenient F(R) theory.

    DOI: 10.1140/epjc/s10052-010-1455-7

  222. Non-singular modified gravity: the unification of the inflation, dark energy and dark mater Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    INVISIBLE UNIVERSE INTERNATIONAL CONFERENCE   Vol. 1241   page: 1094-1099   2010

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  223. One-loop effective action for non-local modified Gauss-Bonnet gravity in de Sitter space Reviewed

    Cognola Guido, Elizalde Emilio, Nojiri Shin'ichi, Odintsov Sergei D., Zerbini Sergio

    EUROPEAN PHYSICAL JOURNAL C   Vol. 64 ( 3 ) page: 483-494   2009.12

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    DOI: 10.1140/epjc/s10052-009-1154-4

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  224. Cosmological reconstruction of realistic modified F(R) gravities Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Saez-Gomez Diego

    PHYSICS LETTERS B   Vol. 681 ( 1 ) page: 74-80   2009.10

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    DOI: 10.1016/j.physletb.2009.09.045

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  225. Singularity of spherically-symmetric spacetime in quintessence/phantom dark energy universe Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 676 ( 1-3 ) page: 94-98   2009.6

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    DOI: 10.1016/j.physletb.2009.04.079

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  226. Singularity of spherically-symmetric spacetime in quintessence/phantom dark energy universe Reviewed

    S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B676   page: 94-98   2009.6

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    We consider ideal fluid and equivalent scalar field dark energy universes where all four known types of finite-time, future singularities occur at some parameter values. It is demonstrated that pressure/energy density of such quintessence/phantom dark energy diverges in spherically-symmetric spacetime at finite radius or at the center. This may cause the instability of the relativistic star or black hole in such universe. The resolution of the problem via the extra modification of the equation of state is briefly discussed.

  227. Gauss-Bonnet chameleon mechanism of dark energy Reviewed

    Ito Yusaku, Nojiri Shin'ichi

    PHYSICAL REVIEW D   Vol. 79 ( 10 )   2009.5

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    DOI: 10.1103/PhysRevD.79.103008

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  228. Crossing of the phantom divide in modified gravity Reviewed

    Bamba Kazuharu, Geng Chao-Qiang, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 79 ( 8 )   2009.4

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    DOI: 10.1103/PhysRevD.79.083014

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  229. Accelerating cosmologies from non-local higher-derivative gravity Reviewed

    Capozziello Salvatore, Elizalde Emilio, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 671 ( 1 ) page: 193-198   2009.1

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    DOI: 10.1016/j.physletb.2008.11.060

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  230. Gauss-Bonnet Chameleon Mechanism of Dark Energy Reviewed

    Gauss-Bonnet Chameleon Mechanism of Dark Energy

    Phys.Rev.   Vol. D79   page: 103008   2009

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    As a model of the current accelerated expansion of the universe, we consider a model of the scalar-Einstein-Gauss-Bonnet gravity. This model includes the propagating scalar modes, which might give a large correction to the Newton law. In order to avoid this problem, we propose an extension of the Chameleon mechanism where the scalar mode becomes massive due to the coupling with the Gauss-Bonnet term. Since the Gauss-Bonnet invariant does not vanish near the earth or in the Solar System, even in the vacuum, the scalar mode is massive even in the vacuum and the correction to the Newton law could be small. We also discuss about the possibility that the model could describe simultaneously the inflation in the early universe, in addition to the current accelerated expansion.

  231. Crossing of the phantom divide in modified gravity Reviewed

    Kazuharu Bamba, Chao-Qiang Geng, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D79:   page: 083014   2009

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    We reconstruct an explicit model of modified gravity in which a crossing of the phantom divide can be realized. It is shown that the (finite-time) Big Rip singularity appears in the model of modified gravity (i.e., in the so-called Jordan frame), whereas that in the corresponding scalar field theory obtained through the conformal transformation (i.e., in the so-called Einstein frame) the singularity becomes the infinite-time one. Furthermore, we investigate the relations between the scalar field theories with realizing a crossing of the phantom divide and the corresponding modified gravitational theories by using the inverse conformal transformation. It is demonstrated that the scalar field theories describing the non-phantom phase (phantom one with the Big Rip) can be represented as the theories of real (complex) $F(R)$ gravity through the inverse (complex) conformal transformation. We also study a viable model of modified gravity in which the transition from the de Sitter universe to the phantom phase can occur. In addition, we explore the stability for the obtained solutions of the crossing of the phantom divide under a quantum correction coming from conformal anomaly.

  232. f(R) gravity constrained by PPN parameters and stochastic background of gravitational waves Reviewed

    S. Capozziello, M. De Laurentis, S. Nojiri, S. D. Odintsov

    Gen.Rel.Grav.   Vol. 41   page: 2313-2344   2009

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    We analyze seven different viable $f(R)$-gravities towards the Solar System tests and stochastic gravitational waves background. The aim is to achieve experimental bounds for the theory at local and cosmological scales in order to select models capable of addressing the accelerating cosmological expansion without cosmological constant but evading the weak field constraints. Beside large scale structure and galactic dynamics, these bounds can be considered complimentary in order to select self-consistent theories of gravity working at the infrared limit. It is demonstrated that seven viable $f(R)$-gravities under consideration not only satisfy the local tests, but additionally, pass the above PPN-and stochastic gravitational waves bounds for large classes of parameters.

  233. Cosmological reconstruction of realistic modified F(R) gravities Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Diego Saez-Gomez

    Phys.Lett.   Vol. B681   page: 74-80   2009

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  234. One-loop effective action for non-local modified Gauss-Bonnet gravity in de Sitter space Reviewed

    Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    Eur.Phys.J.   Vol. C64   page: 483-494   2009

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    We discuss the classical and quantum properties of non-local modified Gauss-Bonnet gravity in de Sitter space, using its equivalent representation via string-inspired local scalar-Gauss-Bonnet gravity with a scalar potential. A classical, multiply de Sitter universe solution is found where one of the de Sitter phases corresponds to the primordial inflationary epoch, while the other de Sitter space solution--the one with the smallest Hubble rate--describes the late-time acceleration of our universe. A Chameleon scenario for the theory under investigation is developed, and it is successfully used to show that the theory complies with gravitational tests. An explicit expression for the one-loop effective action for this non-local modified Gauss-Bonnet gravity in the de Sitter space is obtained. It is argued that this effective action might be an important step towards the solution of the cosmological constant problem.

  235. Modified gravity as realistic candidate for dark energy, inflation and dark matter Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    AIP Conf.Proc.   Vol. 1115   page: 212-217   2009

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    We review the unification of early-time inflation with late-time acceleration in several local modified gravity models which pass Solar System and cosmological tests. It is also demonstrated that account of non-local gravitational corrections to the action does not destroy the possibility of such unification. Dark matter effect is caused by composite graviton degree of freedom in such models.

  236. Accelerating cosmologies from non-local higher-derivative gravity Reviewed

    Salvatore Capozziello, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B671   page: 193-198   2009

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    We study accelerating cosmological solutions of a general class of non-linear gravities which depend on Gauss-Bonnet and other higher derivative invariants. To achieve this goal a local formulation with auxiliary scalars for arbitrary higher-derivative non-local gravity is developed. It is demonstrated that non-local Gauss-Bonnet gravity can be reduced, in the local formulation, to a model of string-inspired scalar-Gauss-Bonnet gravity. A natural unification, in the theory here developed, of the early-time inflation epoch with a late-time

  237. Classifying and avoiding singularities in the alternative gravity dark energy models Reviewed

    S. Capozziello, M. De Laurentis, S. Nojiri, S.D. Odintsov

    Phys.Rev.   Vol. D79   page: 124007   2009

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    The future finite-time singularities emerging in alternative gravity dark energy models are classified and studied in Jordan and Einstein frames. It is shown that such singularity may occur even in flat spacetime for the specific choice of the effective potential. The conditions for the avoidance of finite-time singularities are presented and discussed. The problem is reduced to the study of a scalar field evolving on an effective potential by using the conformal transformations. Some viable modified gravity models are analyzed in detail and the way to cure singularity is considered by introducing the higher-order curvature corrections. These results maybe relevant for the resolution of the conjectured problem in the relativistic star formation in such modified gravity where finite-time singularity is also manifested.

  238. Modified gravity as realistic candidate for dark energy, inflation and dark matter Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    DARK SIDE OF THE UNIVERSE   Vol. 1115   page: 212-+   2009

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  239. The future of the universe in modified gravitational theories: approaching a finite-time future singularity Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 10 )   2008.10

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    DOI: 10.1088/1475-7516/2008/10/045

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  240. Future evolution and finite-time singularities in F(R) gravity unifying inflation and cosmic acceleration Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 78 ( 4 )   2008.8

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    DOI: 10.1103/PhysRevD.78.046006

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  241. Inflationary cosmology and the late-time accelerated expansion of the universe in nonminimal Yang-Mills-F(R) gravity and nonminimal vector-F(R) gravity Reviewed

    Bamba Kazuharu, Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 77 ( 12 )   2008.6

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    DOI: 10.1103/PhysRevD.77.123532

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  242. Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields Reviewed

    Elizalde Emilio, Nojiri Shin'ichi, Odintsov Sergei D., Saez-Gomez Diego, Faraoni Valerio

    PHYSICAL REVIEW D   Vol. 77 ( 10 )   2008.5

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    DOI: 10.1103/PhysRevD.77.106005

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  243. Modified non-local-F (R) gravity as the key for the inflation and dark energy Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 659 ( 4 ) page: 821-826   2008.1

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    DOI: 10.1016/j.physletb.2007.12.001

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  244. Modified f(R) gravity unifying R-m inflation with the Lambda CDM epoch Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 77 ( 2 )   2008.1

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    DOI: 10.1103/PhysRevD.77.026007

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  245. Modified non-local-F(R) gravity as the key for the inflation and dark energy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B659   page: 821-826   2008

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    We consider FRW cosmology in non-local modified gravity. Its local scalar-tensor formulation is developed. It is explicitly demonstrated that such theory may lead to the unification of early-time inflation with late-time cosmic acceleration. The quintessence or phantom era may emerge for specific form of the action. The coupled non-local-F(R) gravity is also investigated. It is shown that such theory being consistent with Solar System tests may lead to the known universe history sequence: inflation, radiation/matter dominance and dark epoch.

  246. Delicate f(R) gravity models with disappearing cosmological constant and observational constraints on the model parameters Reviewed

    Abha Dev, Deepak Jain, S. Jhingan, S. Nojiri, M. Sami, I. Thongkool

    Phys.Rev.   Vol. D78   page: 083515   2008

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    We study the $f(R)$ theory of gravity using metric approach. In particular we investigate the recently proposed model by Hu-Sawicki, Appleby $-$ Battye and Starobinsky. In this model, the cosmological constant is zero in flat space time. The model passes both the Solar system and the laboratory tests. But the model parameters need to be fine tuned to avoid the finite time singularity recently pointed in the literature. We check the concordance of this model with the $H(z)$ and baryon acoustic oscillation data. We find that the model resembles the $\Lambda$CDM at high redshift. However, for some parameter values there are variations in the expansion history of the universe at low redshift.

  247. The Universe future in modified gravity theories: Approaching the finite-time future singularity Reviewed

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    JCAP   Vol. 0810   page: 045   2008

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    We investigate the future evolution of the dark energy universe in modified gravities including $F(R)$ gravity, string-inspired scalar-Gauss-Bonnet and modified Gauss-Bonnet ones, and ideal fluid with the inhomogeneous equation of state (EoS). Modified Friedmann-Robertson-Walker (FRW) dynamics for all these theories may be presented in universal form by using the effective ideal fluid with an inhomogeneous EoS without specifying its explicit form. We construct several examples of the modified gravity which produces accelerating cosmologies ending at the finite-time future singularity of all four known types by applying the reconstruction program. Some scenarios to resolve the finite-time future singularity are presented. Among these scenarios, the most natural one is related with additional modification of the gravitational action in the early universe. In addition, late-time cosmology in the non-minimal Maxwell-Einstein theory is considered. We investigate the forms of the non-minimal gravitational coupling which generates the finite-time future singularities and the general conditions for this coupling in order that the finite-time future singularities cannot emerge. Furthermore, it is shown that the non-minimal gravitational coupling can remove the finite-time future singularities or make the singularity stronger (or weaker) in modified gravity.

  248. The Future evolution and finite-time singularities in F(R)-gravity unifying the inflation and cosmic acceleration Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D78   page: 046006   2008

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  249. Inflationary cosmology and the late-time accelerated expansion of the universe in non-minimal Yang-Mills-F(R) gravity and non-minimal vector-F(R) gravity Reviewed

    Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D77   page: 123532   2008

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  250. Phantom and non-phantom dark energy: The Cosmological relevance of non-locally corrected gravity Reviewed

    S. Jhingan, S. Nojiri, S.D. Odintsov, M. Sami, I Thongkool, S. Zerbini

    Phys.Lett.   Vol. B663   page: 424-428   2008

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    In this paper we have investigated the cosmological dynamics of non-locally corrected gravity involving a function of the inverse d'Alembertian of the Ricci scalar, $f(\Box^{-1} R))$. Casting the dynamical equations into local form, we derive the fixed points of the dynamics and demonstrate the existence and stability of a one parameter family of dark energy solutions for a simple choice, $f(\Box^{-1} R)\sim \exp(\alpha \Box^{-1} R)$. The effective EoS parameter is given by, $w_{\rm eff}=({\alpha-1})/({3\alpha-1})$ and the stability of the solutions is guaranteed provided that $1/3<\alpha<2/3$. For $1/3<\alpha<1/2$ and $1/2<\alpha<2/3$, the underlying system exhibits phantom and non-phantom behavior respectively; the de Sitter solution corresponds to $\alpha=1/2$. For a wide range of initial conditions, the system mimics dust like behavior before reaching the stable fixed point. The late time phantom phase is achieved without involving negative kinetic energy fields. A brief discussion on the entropy of de Sitter space in non-local model is included.

  251. Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields Reviewed

    Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Diego Saez, Valerio Faraoni

    Phys.Rev   Vol. D77   page: 106005   2008

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    We consider the reconstruction technique in theories with a single or multiple (phantom and/or canonical) scalar fields. With the help of several examples, it is demonstrated explicitly that the universe expansion history, unifying early-time inflation and late-time acceleration, can be realized in scalar-tensor gravity. This is generalized to the theory of a scalar field coupled non-minimally to the curvature and to a Brans-Dicke-like theory. Different examples of unification of inflation with cosmic acceleration, in which de Sitter, phantom, and quintessence type fields play the fundamental role--in different combinations--are worked out. Specifically, the frame dependence and stability properties of de Sitter space scalar field theory are studied. Finally, for two-scalar theories, the late-time acceleration and early-time inflation epochs are successfully reconstructed, in realistic situations in which the more and more stringent observational bounds are satisfied, using the freedom of choice of the scalar field potential, and of the kinetic factor.

  252. A Class of viable modified f(R) gravities describing inflation and the onset of accelerated expansion Reviewed

    G. Cognola, E. Elizalde, S. Nojiri, S.D. Odintsov, L. Sebastiani, S. Zerbini

    Phys.Rev.   Vol. D77   page: 046009   2008

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    A general approach to viable modified $f(R)$ gravity is developed in both the Jordan and the Einstein frames. A class of exponential, realistic modified gravities is introduced and investigated with care. Special focus is made on step-class models, most promising from the phenomenological viewpoint and which provide a natural way to classify all viable modified gravities. One- and two-steps models are explicitly considered, but the analysis is extensible to $N$-step models. Both inflation in the early universe and the onset of recent accelerated expansion arise in these models in a natural, unified way. Moreover, it is demonstrated that models in this category easily pass all local tests, including stability of spherical body solution, non-violation of Newton's law, and generation of a very heavy positive mass for the additional scalar degree of freedom.

  253. From inflation to dark energy in the non-minimal modified gravity. Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Petr V. Tretyakov

    Prog.Theor.Phys.Suppl.   Vol. 172   page: 81-89   2008

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    We consider the modified gravity non-minimally coupled with matter Lagrangian for the description of early-time and late-time universe. Such $F(R)$ ($F(G)$) gravity in the absence of non-minimal coupling is viable theory which passes the local tests and reproduces the $\Lambda$CDM era. For qualitatively similar choice of non-minimal gravitational coupling function it is shown that the unified description of early-time inflation and late-time cosmic acceleration is possible. It is interesting that matter (scalar) which supports the inflationary era is gravitationally screened at late times. Hence, it may be effectively invisible at current universe.

  254. Modified f(R) gravity unifying R**m inflation with Lambda CDM epoch Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D77   page: 026007   2008

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  255. Dark energy generated from a (super)string effective action with higher order curvature corrections and a dynamical dilaton Reviewed

    E. Elizalde, S. Jhingan, S. Nojiri, S. D. Odintsov, M. Sami, I. Thongkool

    Eur.Phys.J.   Vol. C53   page: :447-457   2008

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    We investigate the possibility of a dark energy universe emerging from an action with higher-order string loop corrections to Einstein gravity in the presence of a massless dilaton. These curvature corrections (up to $R^4$ order) are different depending upon the type of (super)string model which is considered. We find in fact that Type II, heterotic, and bosonic strings respond differently to dark energy. A dark energy solution is shown to exist in the case of the bosonic string, while the other two theories do not lead to realistic dark energy universes. Detailed analysis of the dynamical stability of the de-Sitter solution is presented for the case of a bosonic string. A general prescription for the construction of a de-Sitter solution for the low-energy (super)string effective action is also indicated. Beyond the low-energy (super)string effective action, when the higher-curvature correction coefficients depend on the dilaton, the reconstruction of the theory from the universe expansion history is done with a corresponding prescription for the scalar potentials.

  256. From inflation to dark energy in the non-minimal modified gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Tretyakov Petr V.

    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT   ( 172 ) page: 81-89   2008

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  257. Unifying inflation with ACDM epoch in modified f (R) gravity consistent with Solar System tests Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 657 ( 4-5 ) page: 238-245   2007.12

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    DOI: 10.1016/j.physletb.2007.10.027

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  258. Newton law corrections and instabilities in f(R) gravity with the effective cosmological constant epoch Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 652 ( 5-6 ) page: 343-348   2007.9

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    DOI: 10.1016/j.physletb.2007.07.039

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  259. Dark energy from modified F(R)-scalar-Gauss-Bonnet gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Tretyakov Petr V.

    PHYSICS LETTERS B   Vol. 651 ( 2-3 ) page: 224-231   2007.7

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    DOI: 10.1016/j.physletb.2007.06.029

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  260. Dark energy from modified F(R)-scalar-Gauss-Bonnet gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Petr V. Tretyakov

    Phys.Lett.   Vol. B651   page: 224-231   2007.7

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    The modified F(R)-scalar-Gauss-Bonnet gravity is proposed as dark energy model. The reconstruction program for such theory is developed. It is explicitly demonstrated that the known classical universe expansion history (deceleration epoch, transition to acceleration and effective quintessence, phantom or cosmological constant era) may naturally occur in such unified theory for some (reconstructed) classes of scalar potentials. Gauss-Bonnet assisted dark energy is also proposed. The possibility of cosmic acceleration is studied there.

  261. Modified gravity as an alternative for ACDM cosmology Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL   Vol. 40 ( 25 ) page: 6725-6732   2007.6

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    DOI: 10.1088/1751-8113/40/25/S17

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  262. Multiple lambda cosmology: Dark fluid with time-dependent equation of state as classical analog of cosmological landscape Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 649 ( 5-6 ) page: 440-444   2007.6

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    DOI: 10.1016/j.physletb.2007.02.042

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  263. String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy Reviewed

    Cognola Guido, Elizalde Emilio, Nojiri Shin'ichi, Odintsov Sergei D., Zerbini Sergio

    PHYSICAL REVIEW D   Vol. 75 ( 8 )   2007.4

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    DOI: 10.1103/PhysRevD.75.086002

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  264. Modified gravity as an alternative for Lambda-CDM cosmology Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    J.Phys.   Vol. A40   page: 6725-6732   2007

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    The reconstruction scheme is developed for modified f(R) gravity with realistic matter (dark matter, baryons, radiation). Two versions of such theory are constructed: the first one describes the sequence of radiation and matter domination, decceleration-acceleration transition and acceleration era and the second one is reconstructed from exact Lambda-CDM cosmology. The asymptotic behaviour of first model at late times coincides with the theory containing positive and negative powers of curvature while second model approaches to General Relativity without singularity at zero curvature.

  265. Unifying inflation with LambdaCDM epoch in modified f(R) gravity consistent with Solar System tests Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B657   page: 238-245   2007

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    We suggest two realistic f(R) and one F(G) modified gravities which are consistent with local tests and cosmological bounds. The typical property of such theories is the presence of the effective cosmological constant epochs in such a way that early-time inflation and late-time cosmic acceleration are naturally unified within single model. It is shown that classical instability does not appear here and Newton law is respected. Some discussion of possible anti-gravity regime appearence and related modification of the theory is done.

  266. Newton law corrections and instabilities in f(R) gravity with the effective cosmological constant epoch Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B652   page: 343-348   2007

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    We consider class of modified $f(R)$ gravities with the effective cosmological constant epoch at the early and late universe. Such models pass most of solar system tests as well they satisfy to cosmological bounds. Despite their very attractive properties, it is shown that one realistic class of such models may lead to significant Newton law corrections which become small at the future universe only. The model with acceptable Newton law regime shows the matter instability. This suggests that more complicated version of such theory (or extended parameters space) should be investigated.

  267. *Introduction to modified gravity and gravitational alternative for dark energy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Int.J.Geom.Meth.Mod.Phys   Vol. 4   page: 115-146   2007

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    We review various modified gravities considered as gravitational alternative for dark energy. Specifically, we consider the versions of f(R), f(G) or f(R,G) gravity, model with non-linear gravitational coupling or string-inspired model with Gauss-Bonnet-dilaton coupling in the late universe where they lead to cosmic speed-up. It is shown that some of such theories may pass the Solar System tests. On the same time, it is demonstrated that they have quite rich cosmological structure: they may naturally describe the effective (cosmological constant, quintessence or phantom) late-time era with a possible transition from decceleration to acceleration thanks to gravitational terms which increase with scalar curvature decrease. The possibility to explain the coincidence problem as the manifestation of the universe expansion in such models is mentioned. The late (phantom or quintessence) universe filled with dark fluid with inhomogeneous equation of state (where inhomogeneous terms are originated from the modified gravity) is also described.

  268. Multiple Lambda cosmology: Dark fluid with time-dependent equation of state as classical analog of cosmological landscape Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B649   page: 440-444   2007

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    We discuss FRW universe with time-dependent EoS dark fluid which leads to multiple de Sitter space. This model (as well as its scalar-tensor version) may be considered as some classical analog of cosmological landscape. The universe expansion history may look as transitions between different deSitter eras what suggests the interesting solution for cosmological constant problem. For specific time-dependent EoS dark fluid the possibility of transitions between universe regions with positive and negative cosmological constant is also established.

  269. Phantom scalar dark energy as modified gravity: Understanding the origin of the Big Rip singularity Reviewed

    F. Briscese, E. Elizalde, S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B646   page: 105-111   2007

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    2007

  270. String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy Reviewed

    Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei Odintsov, Sergio Zerbini

    Phys.Rev.   Vol. D75   page: 086002   2007

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    We consider scalar-Gauss-Bonnet and modified Gauss-Bonnet gravities and reconstruct these theories from the universe expansion history. In particular, we are able to construct versions of those theories (with and without ordinary matter), in which the matter dominated era makes a transition to the cosmic acceleration epoch. It is remarkable that, in several of the cases under consideration, matter dominance and the deceleration-acceleration transition occur in the presence of matter only. The late-time acceleration epoch is described asymptotically by de Sitter space but may also correspond to an exact $\Lambda$CDM cosmology, having in both cases an effective equation of state parameter $w$ close to -1. The one-loop effective action of modified Gauss-Bonnet gravity on the de Sitter background is evaluated and it is used to derive stability criteria for the ensuing de Sitter universe.

  271. Modified gravity and its reconstruction from the universe expansion history Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    J.Phys.Conf.Ser.   Vol. 66   page: 012005   2007

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    We develop the reconstruction program for the number of modified gravities: scalar-tensor theory, f(R), F(G) and string-inspired, scalar-Gauss-Bonnet gravity. The known (classical) universe expansion history is used for the explicit and successful reconstruction of some versions (of special form or with specific potentials) from all above modified gravities. It is demonstrated that cosmological sequence of matter dominance, decceleration-acceleration transition and acceleration era may always emerge as cosmological solutions of such theory. Moreover, the late-time dark energy FRW universe may have the approximate or exact Lambda-CDM form consistent with three years WMAP data. The principal possibility to extend this reconstruction scheme to include the radiation dominated era and inflation is briefly mentioned. Finally, it is indicated how even modified gravity which does not describe the matter-dominated epoch may have such a solution before acceleration era at the price of the introduction of compensating dark energy.

  272. Modified f(R) gravity consistent with realistic cosmology: From a matter dominated epoch to a dark energy universe Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICAL REVIEW D   Vol. 74 ( 8 )   2006.10

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    DOI: 10.1103/PhysRevD.74.086005

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  273. Transition from a matter-dominated era to a dark energy universe Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Stefancic Hrvoje

    PHYSICAL REVIEW D   Vol. 74 ( 8 )   2006.10

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    DOI: 10.1103/PhysRevD.74.086009

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  274. The new form of the equation of state for dark energy fluid and accelerating universe Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 639 ( 3-4 ) page: 144-150   2006.8

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    DOI: 10.1016/j.physletb.2006.06.065

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  275. Dark energy cosmology from higher-order, string-inspired gravity, and its reconstruction Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Sami M.

    PHYSICAL REVIEW D   Vol. 74 ( 4 )   2006.8

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    DOI: 10.1103/PhysRevD.74.046004

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  276. Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    GENERAL RELATIVITY AND GRAVITATION   Vol. 38 ( 8 ) page: 1285-1304   2006.8

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    DOI: 10.1007/s10714-006-0301-6

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  277. Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Gen.Rel.Grav.   Vol. 38   page: 1285-1304   2006.7

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    The unifying approach to early-time and late-time universe based on phantom cosmology is proposed. We consider gravity-scalar system which contains usual potential and scalar coupling function in front of kinetic term. As a result, the possibility of phantom-non-phantom transition appears in such a way that universe could have effectively phantom equation of state at early time as well as at late time. In fact, the oscillating universe may have several phantom and non-phantom phases. As a second model we suggest generalized holographic dark energy where infrared cutoff is identified with combination of FRW parameters: Hubble constant, particle and future horizons, cosmological constant and universe life-time (if finite). Depending on the specific choice of the model the number of interesting effects occur: the possibility to solve the coincidence problem, crossing of phantom divide and unification of early-time inflationary and late-time accelerating phantom universe. The bound for holographic entropy which decreases in phantom era is also discussed.

  278. The oscillating dark energy: future singularity and coincidence problem Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D.

    PHYSICS LETTERS B   Vol. 637 ( 3 ) page: 139-148   2006.6

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    DOI: 10.1016/j.physletb.2006.04.026

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  279. Dark energy problem: from phantom theory to modified Gauss-Bonnet gravity Reviewed

    Nojiri Shin'ichi, Odintsov Sergei D., Gorbunova O. G.

    JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL   Vol. 39 ( 21 ) page: 6627-6633   2006.5

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    DOI: 10.1088/0305-4470/39/21/S62

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  280. Dark energy in modified Gauss-Bonnet gravity: Late-time acceleration and the hierarchy problem Reviewed

    Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    Phys.Rev.   Vol. D73   page: 084007   2006.4

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    Dark energy cosmology is considered in a modified Gauss-Bonnet (GB) model of gravity where an arbitrary function of the GB invariant, f(G), is added to the General Relativity action. We show that such theory is endowed with a quite rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with a possible transition from deceleration to acceleration. It is demonstrated in the paper that this theory is perfectly viable, since it is compliant with Solar System constraints. Specific properties of $f(G)$ gravity in a de Sitter universe, such as dS and SdS solutions, their entropy and its explicit one-loop quantization are studied. The issue of a possible solution of the hierarchy problem in modified gravities is addressed too.

  281. Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase Reviewed

    Salvatore Capozziello, S. Nojiri, S.D. Odintsov, A. Troisi

    Phys.Lett.   Vol. B639   page: 135-143   2006

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    We show that f(R)-gravity can, in general, give rise to cosmological viable models compatible with a matter-dominated epoch evolving into a late accelerated phase. We discuss the various representations of f(R)-gravity as an ideal fluid or a scalar-tensor gravity theory, taking into account conformal transformations. We point out that mathematical equivalence does not correspond, in several cases, to the physical equivalence of Jordan frame and Einstein frame. Finally, we show that wide classes of f(R)-gravity models, including matter and accelerated phases, can be phenomenologically reconstructed by means of observational data. In principle, any popular quintessence models could be "reframed" as an f(R)-gravity model.

  282. Observational constraints on dark energy with generalized equations of state Reviewed

    Salvatore Capozziello, V.F. Cardone, E. Elizalde, S. Nojiri, S.D. Odintsov

    Phys.Rev.   Vol. D73   page: 043512   2006

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    We investigate the effects of viscosity terms depending on the Hubble parameter and its derivatives in the dark energy equation of state. Such terms are possible if dark energy is a fictitious fluid originating from corrections to the Einstein general relativity as is the case for some braneworld inspired models or fourth order gravity. We consider two classes of models whose singularities in the early and late time universe have been studied by testing the models against the dimensionless coordinate distance to Type Ia Supernovae and radio-galaxies also including priors on the shift and the acoustic peak parameters. It turns out that both models are able to explain the observed cosmic speed up without the need of phantom (w < -1) dark energy

  283. Unified phantom cosmology: Inflation, dark energy and dark matter under the same standard Reviewed

    S. Capozziello, S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B632   page: 597-604   2006

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    Phantom cosmology allows to account for dynamics and matter content of the universe tracing back the evolution to the inflationary epoch, considering the transition to the non-phantom standard cosmology (radiation/matter dominated eras) and recovering the today observed dark energy epoch. We develop the unified phantom cosmology where the same scalar plays the role of early time (phantom) inflaton and late-time Dark Energy. The recent transition from decelerating to accelerating phase is described too by the same scalar field. The (dark) matter may be embedded in this scheme, giving the natural solution of the coincidence problem. It is explained how the proposed unified phantom cosmology can be fitted against the observations which opens the way to define all the important parameters of the model.

  284. Dark energy problem: From phantom theory to modified Gauss-Bonnet gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, O.G. Gorbunova

    J.Phys.   Vol. A39   page: 6627-6634   2006

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    The solution of dark energy problem in the models without scalars is presented. It is shown that late-time accelerating cosmology may be generated by the ideal fluid with some implicit equation of state. The universe evolution within modified Gauss-Bonnet gravity is considered. It is demonstrated that such gravitational approach may predict the (quintessential, cosmological constant or transient phantom) acceleration of the late-time universe with natural transiton from deceleration to acceleration (or from non-phantom to phantom era in the last case).

  285. The Oscillating dark energy: Future singularity and coincidence problem Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B637   page: 139-148   2006

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    We consider the oscillating dark energy with periodic equation of state in two equivalent formulations: ideal fluid or scalar-tensor theory. It is shown that such dark energy suggests the natural way for the unification of early-time inflation with late-time acceleration. We demonstrate how it describes the transition from deceleration to acceleration or from non-phantom to phantom era and how it solves the coincidence problem. The occurence of finite-time future singularity for the oscillating (phantom) universe is also investigated.

  286. On the way from matter-dominated era to dark energy universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D74   page: 086009   2006

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    We develop the general program of the unification of matter-dominated era with acceleration epoch for scalar-tensor theory or dark fluid. The general reconstruction of single scalar-tensor theory is fulfilled. The explicit form of scalar potential for which the theory admits matter-dominated era, transition to acceleration and (asymptotically deSitter) acceleration epoch consistent with WMAP data is found. The interrelation of the epochs of deceleration-acceleration transition and matter dominance-dark energy transition for dark fluids with general EOS is investigated. We give several examples of such models with explicit EOS (using redshift parametrization) where matter-dark energy domination transition may precede the deceleration-acceleration transition. As some by-product, the reconstruction scheme is applied to scalar-tensor theory to define the scalar potentials which may produce the dark matter effect. The obtained modification of Newton potential may explain the rotation curves of galaxies.

  287. Modified f(R) gravity consistent with realistic cosmology: From matter dominated epoch to dark energy universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D74   page: 086005   2006

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    We develop the general scheme for modified f(R) gravity reconstruction from any realistic FRW cosmology. We formulate several versions of modified gravity compatible with Solar System tests where the following sequence of cosmological epochs occurs: a. matter dominated phase (with or without usual matter), transition from decceleration to acceleration, accelerating epoch consistent with recent WMAP data b. Lambda-CDM cosmology without cosmological constant. As a rule, such modified gravities are expressed implicitly (in terms of special functions) with late-time asymptotics of known type (for instance, the model with negative and positive powers of curvature). In the alternative approach, it is demonstrated that even simple versions of modified gravity may lead to the unification of matter dominated and accelerated phases at the price of the introduction of compensating dark energy.

  288. The New form of the equation of state for dark energy fluid and accelerating universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B639   page: 144-150   2006

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    We suggest to generalize the dark energy equation of state (EoS) by introduction the relaxation equation for pressure which is equivalent to consideration of the inhomogeneous EoS cosmic fluid which often appears as the effective model from strings/brane-worlds. As another, more wide generalization we discuss the inhomogeneous EoS which contains derivatives of pressure. For several explicit examples motivated by the analogy with classical mechanics the accelerating FRW cosmology is constructed. It turns out to be the asymptotically de Sitter or oscillating universe with possible transition from deceleration to acceleration phase. The coupling of dark energy with matter in accelerating FRW universe is considered, it is shown to be consistent with constrained (or inhomogeneous) EoS.

  289. Dark energy cosmology from higher-order, string-inspired gravity and its reconstruction Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, M. Sami

    Phys.Rev.   Vol. D74   page: 046004   2006

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    In this paper we investigate the cosmological effects of modified gravity with string curvature corrections added to Einstein-Hilbert action in the presence of a dynamically evolving scalar field coupled to Riemann invariants. The scenario exhibits several features of cosmological interest for late universe. It is shown that higher order stringy corrections can lead to a class of dark energy models consistent with recent observations. The model can give rise to quintessence, deSitter or phantom dark energy, in last case without recourse to negative kinetic energy field. The detailed treatment of reconstruction program for general scalar-Gauss-Bonnet gravity is presented for any given cosmology. The explicit examples of reconstructed scalar potentials are given for accelerated (quintessence, cosmological constant or phantom) universe. Finally, the relation with modified F(G) gravity is established on classical level and is extended to include third order terms on curvature.

  290. Dark energy: The Equation of state description versus scalar-tensor or modified gravity Reviewed

    S. Capozziello, S. Nojiri, S.D. Odintsov

    Phys.Lett.   Vol. B634   page: 93-100   2006

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    Dark energy dynamics of the universe can be achieved by equivalent mathematical descriptions taking into account generalized fluid equations of state in General Relativity, scalar-tensor theories or modified F(R) gravity in Einstein or Jordan frames. The corresponding technique transforming equation of state description to scalar-tensor or modified gravity is explicitly presented. We show that such equivalent pictures can be discriminated by matching solutions with data capable of selecting the true physical frame

  291. Inhomogeneous equation of state of the universe: Phantom era, future singularity and crossing the phantom barrier Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D72   page: 023003   2005

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  292. Modified Gauss-Bonnet theory as gravitational alternative for dark energy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B631   page: 1-6   2005

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  293. The One-loop effective action in phi**4 theory coupled non-linearly with curvature power and dynamical origin of cosmological constant Reviewed

    T. Inagaki, S. Nojiri, S.D. Odintsov

    JCAP   Vol. 0506   page: 010   2005

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  294. Consistent modified gravity: Dark energy, acceleration and the absence of cosmic doomsday Reviewed

    M.C.B. Abdalla, Shin'ichi Nojiri, Sergei D. Odintsov

    Class.Quant.Grav.   Vol. 22   page: L35   2005

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  295. Is brane cosmology predictable? Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Gen.Rel.Grav.   Vol. 37   page: 1419-1425   2005

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  296. One-loop f(R) gravity in de Sitter universe Reviewed

    Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    JCAP   Vol. 0502   page: 010   2005

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  297. Dark energy: Vacuum fluctuations, the effective phantom phase, and holography Reviewed

    Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Peng Wang

    Phys.Rev.   Vol. D71   page: 103504   2005

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  298. Gauss-Bonnet dark energy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Misao Sasaki

    Phys.Rev.   Vol. D71   page: 123509   2005

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  299. The Final state and thermodynamics of dark energy universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D70   page: 103522   2004

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    As it follows from the classical analysis, the typical final state of the dark energy universe where dominant energy condition is violated is finite time, sudden future singularity (Big Rip). For a number of dark energy universes (including scalar phantom and effective phantom theories as well as specific quintessence model) we demonstrate that quantum effects play the dominant role near Big Rip, driving the universe out of future singularity (or, at least, making it milder). As a consequence, the entropy bounds with quantum corrections become well-defined near Big Rip. Similarly, black holes mass loss due to phantom accretion is not so dramatic as it was expected: masses do not vanish to zero due to transient character of phantom evolution stage. Some examples of cosmological evolution for negative, time-dependent equation of state are also considered with the same conclusions. The application of negative entropy (or negative temparature) occurence in the phantom thermodynamics is briefly discussed.

  300. Dark energy and cosmic speed-up from consistent modified gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    PoS   Vol. WC2004   page: 024   2004

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  301. The One loop vacuum energy and RG flow induced by double trace operators in AdS / CFT and dS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D69   page: 023511   2004

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  302. Cosmological anti-de Sitter space-times and time dependent AdS / CFT correspondence Reviewed

    Mirjam Cvetic, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D69   page: 023513   2004

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  303. The Minimal curvature of the universe in modified gravity and conformal anomaly resolution of the instabilities Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Mod.Phys.Lett.   Vol. A19   page: 627-638   2004

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  304. Quantum effects and stability of chameleon cosmology Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Mod.Phys.Lett.   Vol. A19   page: 1273-1280   2004

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  305. Multigraviton theory from a discretized RS brane world and the induced cosmological constant Reviewed

    Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    Mod.Phys.Lett.   Vol. A19   page: 1435-1446   2004

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  306. Entropy and universality of Cardy-Verlinde formula in dark energy universe Reviewed

    Iver Brevik, Shin'ichi Nojiri, Sergei D. Odintsov, Luciano Vanzo

    Phys.Rev.   Vol. D70   page: 043520   2004

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  307. Freedom in electroweak symmetry breaking and mass matrix of fermions in dimensional deconstruction model Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Akio Sugamoto

    Phys.Lett.   Vol. B590   page: 239-248   2004

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  308. Multisupergravity from latticized extra dimension Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B590   page: 295-302   2004

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  309. Gravity assisted dark energy dominance and cosmic acceleration Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B599   page: 137-142   2004

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  310. *Late-time cosmology in (phantom) scalar-tensor theory: Dark energy and the cosmic speed-up Reviewed

    Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D70   page: 043539   2004

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  311. Quantum escape of sudden future singularity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B595   page: 1-8   2004

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  312. Dark energy and modified gravities Reviewed

    Shin'ichi Nojiri

    TSPU Vestnik   Vol. 44N7   page: 49-57   2004

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  313. AdS / CFT correspondence and quantum induced dilatonic multibrane worlds Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Rev.Mex.Fis.   Vol. 49S1   page: 38-43   2003

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  314. Bulk and brane gauge propagator on 5-D AdS black hole Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B562   page: 9-17   2003

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  315. deSitter brane universeinduced by phantom and quantum effects Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B565   page: 1-9   2003

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    Five-dimensional braneworld cosmology with deSitter (inflationary) brane universe induced by classical and quantum matter is discussed. It is shown that negative energy phantom field with quantum CFT supports the creation of deSitter universe. On the same time, pure phantom or dust with quantum effects, or Chaplygin gas with quantum effects may naturally lead to the occurence of Anti-deSitter brane universe but not deSitter one. It is also interesting that unlike to four-dimensional gravity, for phantom with (or without) quantum contribution the standard cosmological energy conditions may be effectively satisfied.

  316. Modified gravity with ln R terms and cosmic acceleration Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D68   page: 123512   2003

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  317. Casimir effect in de Sitter and anti-de Sitter brane worlds Reviewed

    Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Rev.   Vol. Phys.Rev.   page: D67   2003

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  318. Higher derivative gravities and negative entropy Reviewed

    Shin'ichi Nojiri

    Grav.Cosmol   Vol. 9   page: 71-78   2003

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  319. Universal features of the holographic duality: Conformal anomaly and brane gravity trapping from 5-D AdS black hole Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Int.J.Mod.Phys.   Vol. A18   page: 2001-2010   2003

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  320. Logarithmic corrections to the FRW brane cosmology from 5-D Schwarzschild-de Sitter black hole Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Int.J.Mod.Phys.   Vol. A18   page: 3395-3416   2003

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  321. Quantum effects in five-dimensional brane world: Creation of de Sitter branes and particles and stabilization of induced cosmological constant Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    JCAP   Vol. 0306   page: 004   2003

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  322. *Quantum de Sitter cosmology and phantom matter Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B562   page: 147-152   2003

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  323. Effective equation of state and energy conditions in phantom / tachyon inflationary cosmology perturbed by quantum effects Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B571   page: 1-10   2003

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  324. Where new gravitational physics comes from: M Theory? Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B576   page: 5-11   2003

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  325. Born-Infeld quantum condensate as dark energy in the universe Reviewed

    Emilio Elizalde, James E. Lidsey, Shinichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B574   page: 1-7   2003

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  326. On the way to brane new world Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Grav.Cosmol.   Vol. 8   page: 73-86   2002

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  327. Cosmological constant and brane new world Reviewed

    Shin'ichi Nojiri, Octavio Obregon, Sergei D. Odintsov

    Rev.Mex.Fis.   Vol. 48   page: 19-22   2002

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  328. Cosmological and black hole brane world universes in higher derivative gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Rev.   Vol. D65   page: 23521   2002

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  329. Anti-de Sitter black hole thermodynamics in higher derivative gravity and new confining deconfining phases in dual CFT Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B521   page: 87-95   2002

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  330. Black hole thermodynamics and negative entropy in de Sitter and anti-de Sitter Einstein-Gauss-Bonnet gravity Reviewed

    Mirjam Cvetic, Shin'ichi Nojiri, Sergei D. Odin

    Nucl.Phys.   Vol. B628   page: 295-330   2002

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  331. Newton potential in deSitter brane world Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B548   page: 215-223   2002

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  332. Wilson loop and dS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B528   page: 169-174   2002

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  333. Asymptotically de Sitter dilatonic space-time, holographic RG flow and conformal anomaly from (dilatonic) dS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B531   page: 143-151   2002

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  334. Graviton correlator and metric perturbations in de Sitter brane world Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Rev.   Vol. D66   page: 023522   2002

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  335. Brane world cosmology in (anti)-de Sitter Einstein-Gauss-Bonnet-Maxwell gravity Reviewed

    James E. Lidsey, Shin'ichi Nojiri, Sergei D. Odintsov

    JHEP   Vol. 0206   page: 026   2002

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  336. Stabilization and radion in de Sitter brane world Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Akio Sugamoto

    Mod.Phys.Lett.   Vol. A17   page: 1269-1276   2002

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  337. (Anti-) de Sitter black holes in higher derivative gravity and dual conformal field theories Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D66   page: 044012   2002

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  338. Friedmann-Robertson-Walker brane cosmological equations from the five-dimensional bulk (A)dS black hole Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Int.J.Mod.Phys.   Vol. A17   page: 4809-4870   2002

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  339. Entropy bounds and Cardy-Verlinde formula in Yang-Mills theory Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B540   page: 167-172   2002

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  340. The AdS / CFT correspondence and logarithmic corrections to brane world cosmology and the Cardy-Verlinde formula Reviewed

    James E. Lidsey, Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Lett.   Vol. B544   page: 337-345   2002

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  341. String versus Einstein frame in AdS / CFT induced quantum dilatonic brane world universe Reviewed

    Shin'ichi Nojiri, Octavio Obregon, Sergei D. Odintsov, Vladimir I. Tkach

    Phys.Rev.   Vol. D64   page: 043505   2001

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  342. Supersymmetric new brane world Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D64   page: 023502   2001

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  343. Quantum stabilization of thermal brane worlds in M theory Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Lett.   Vol. B506   page: 200-206   2001

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  344. AdS / CFT and quantum corrected brane entropy Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Class.Quant.Grav.   Vol. 18   page: 5227-5238   2001

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  345. Quantum bounds for gravitational de Sitter entropy and the Cardy-Verlinde formula Reviewed

    Shin'ichi Nojiri, Octavio Obregon, Sergei D. Odintsov, Hernando Quevedo, Mike P. Ryan

    Mod.Phys.Lett.   Vol. A16   page: 1181-1192   2001

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  346. Holographic entropy and brane FRW dynamics from AdS black hole in d5 higher derivative gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Int.J.Mod.Phys.   Vol. A16   page: 5085   2001

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  347. Conformal anomaly from dS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B519   page: 145-148   2001

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  348. Quantum cosmology, inflationary brane world creation and dS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    JHEP   Vol. 0112   page: 033   2001

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  349. De Sitter space versus Nariai black hole: Stability in d5 higher derivative gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B523   page: 165-170   2001

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  350. Holographic renormalization group and conformal anomaly for AdS(9) / CFT(8) correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Lett.   Vol. B500   page: 199-208   2001

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  351. Dilatonic quantum multibrane worlds Reviewed

    Shinichi Nojiri, Sergei D. Odintsov, K.E. Osetrin

    Phys.Rev.   Vol. D63   page: 084016   2001

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  352. Quantum dilatonic gravity in (D = 2)-dimensions, (D = 4)-dimensions and (D = 5)-dimensions Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Int.J.Mod.Phys.   Vol. A16   page: 1015-1108   2001

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  353. Dynamical brane from gravitational dual of N=2 Sp(N) superconformal field theory Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Prog.Theor.Phys.   Vol. 105   page: 869-879   2001

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  354. Quantum (in)stability of a brane world AdS(5) universe at nonzero temperature Reviewed

    Iver Brevik, Kimball A. Milton, Shin'ichi Nojiri, Sergei D. Odintsov

    Nucl.Phys.   Vol. B599   page: 305-318   2001

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  355. AdS / CFT correspondence, conformal anomaly and quantum corrected entropy bounds Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Int.J.Mod.Phys.   Vol. A16   page: 3273-3290   2001

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  356. Scheme dependence of holographic conformal anomaly in 5-d gauged supergravity with nontrivial bulk potential Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Lett.   Vol. B494   page: 318-324   2000

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  357. Running gauge coupling and quark - anti-quark potential in nonSUSY gauge theory at finite temperature from IIB SG / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D61   page: 024027   2000

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  358. Weyl anomaly from Weyl gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Mod.Phys.Lett.   Vol. A15   page: 1043-1050   2000

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  359. Finite gravitational action for higher derivative and stringy gravities Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Rev.   Vol. D62   page: 064018   2000

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  360. Conformal anomaly from d-5 gauged supergravity and c function away from conformity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Grav.Cosmol.   Vol. 6   page: 271-276   2000

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  361. Finite action in d-5 gauged supergravity and dilatonic conformal anomaly for dual quantum field theory Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Rev.   Vol. D62   page: 124002   2000

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  362. Quantum (in)stability of dilatonic AdS backgrounds and holographic renormalization group with gravity Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    Phys.Rev.   Vol. D62   page: 064006   2000

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  363. Dilatonic brane world black holes, gravity localization and Newton constant Reviewed

    Shin'ichi Nojiri, Octavio Obregon, Sergei D. Odintsov, Sachiko Ogushi

    Phys.Rev.   Vol. D62   page: 064017   2000

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  364. Brane world inflation induced by quantum effects Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B484   page: 119-123   2000

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  365. (Non)singular brane world cosmology induced by quantum effects in d-5 dilatonic gravity Reviewed

    Shin'ichi Nojiri, Octavio Obregon, Sergei D. Odintsov

    Phys.Rev.   Vol. D62   page: 104003   2000

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  366. Holographic conformal anomaly with bulk scalars potential from d-3 and d-5 gauged supergravity Reviewed

    Shinichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi

    Prog.Theor.Phys.   Vol. 104   page: 867-876   2000

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  367. Bulk versus boundary (gravitational Casimir) effects in quantum creation of inflationary brane world universe Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

    Class.Quant.Grav.   Vol. 17   page: 4855-4866   2000

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  368. Brane world cosmology in higher derivative gravity or warped compactification in the next-to-leading order of AdS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    JHEP   Vol. 0007   page: 049   2000

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  369. Can we live on the brane in Schwarzschild-anti-de Sitter black hole? Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B493   page: 153-161   2000

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  370. AdS / CFT correspondence in cosmology Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B494   page: 135-140   2000

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  371. Axion - dilatonic conformal anomaly from AdS / CFT correspondence Reviewed

    Shinichi Nojiri, Sergei D. Odintsov, Sachiko Ogushi, Akio Sugamoto, Miho Yamamoto

    Phys.Lett.   Vol. B465   page: 128-135   1999

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  372. Unified approach to study quantum properties of primordial black holes, wormholes and of quantum cosmology Reviewed

    S. Nojiri, O. Obregon, S.D. Odintsov

    Mod.Phys.Lett.   Vol. A14   page: 1309-1316   1999

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  373. Strong coupling limit of N=2 SCFT free energy and higher derivative AdS / CFT correspondence Reviewed

    Shin'ichi Nojiri, Sergei D. Odintsov

    Phys.Lett.   Vol. B471   page: 155-161   1999

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Books 1

  1. 物理学ミニマ

    野尻 伸一 (著), 伊藤 好孝 (著), 藤 博之 (著), 門田 健司 (著), 杉山 直 (監修)( Role: Joint author)

    名古屋大学出版会   2014.6  ( ISBN:978-4815807740

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    Total pages:276   Language:Japanese Book type:Textbook, survey, introduction

Presentations 21

  1. Reconstruction of Modified Gravity Theories: FRW Universe Invited International coauthorship International conference

    Shin'ichi Nojiri

    V Institute of Space Sciences Summer School  2022.7.5  Institute of Space Sciences

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    Event date: 2022.7

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Barcelona   Country:Spain  

  2. Compact Star in General F(R) Gravity and Non-Integer Power Correction Invited

    Shin'ichi Nojiri

    Recent Advances in Theoretical Cosmology and Astrophysics  2021.12.16  Thessaloniki University

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    Event date: 2021.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Rhodes   Country:Greece  

  3. Statistical System based on p-adic number Invited

    Shin'ichi Nojiri

    Symmetry 2021 - The 3rd International Conference on Symmetry  2021.8.8  Ben-Gurion University of the Negev and the MDPI journal Symmetry

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    Event date: 2021.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Ben-Gurion University of the Negev   Country:Israel  

  4. BRS Symmetry and Cosmological Constant Problem Invited

    Shin'ichi Nojiri

    2nd International Conference on Symmetry  2019.9.3 

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    Event date: 2019.9

  5. Gravitational Wave in Media Invited International conference

    Shin'ichi Nojiri

    2019 CCNU - cfa@USTC Junior Cosmology Symposium  2019.4.27 

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    Event date: 2019.4

    Language:English  

    Venue:Wuhan Hubei   Country:China  

  6. My works with Sergei Invited International conference

    Shin'ichi Nojiri

    Siberian Spring Cosmology:  2019.3.1  Tomsk State Pedagogical University

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    Event date: 2019.3

    Venue:Tomsk   Country:Russian Federation  

  7. Gravitational Wave in Modifed Gravity Theories International conference

    Shin'ichi Nojiri

    V Workshop on COSMOLOGY AND THE QUANTUM VACUUM  2018.9.2 

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    Event date: 2018.9

    Venue:Benasque   Country:Spain  

  8. Simple model of Cosmological Constant

    Shin'ichi Nojiri

    IV Cosmology and the Quantum Vacuum, 2017  2017.9.7 

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    Event date: 2017.9

  9. Some Solutions for One of the Cosmological Constant Problems International conference

    Shin'ichi Nojiri

    4th International Workshop on Dark Matter, Dark Energy and Matter-Antimatter Asymmetry, 2016  2016.12.29  National Center for Theoretical Sciences

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    Event date: 2016.12

    Country:Taiwan, Province of China  

  10. Cosmology in Bigravity Theories I, II Invited International conference

    Shin'ichi Nojiri

    2nd International Winter School-Seminar on Gravity, Cosmology, and Astrophysics (Petrov School), 2016  Kazan Federal University

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    Event date: 2016.12

    Venue:Kazan   Country:Russian Federation  

  11. Dynamical Domain Wall and Localization Invited International conference

    Shin'ichi Nojiri

    Windows on Quantum Gravity: Season 2  2015.10.28  Instituto de Física Teórica UAM-CSIC

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    Event date: 2015.10

    Venue:Madrid   Country:Spain  

  12. New theories of massive spin-two particle Invited International conference

    Shin'ichi Nojiri

    Cosmology and the Quantum Vacuum 2015  2015.6.20 

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    Event date: 2015.6

    Language:English  

    Venue:Rhodes Island   Country:Greece  

  13. New theory of massive spin-two field Invited International conference

    Shin'ichi Nojiri

    2nd International Workshop on Particle Physics and Cosmology after Higgs and Planck  2014.10.8  National Center for Theoretical Sciences

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    Event date: 2014.10

    Language:English  

    Venue:National Tsing Hua University and Chongqing   Country:Taiwan, Province of China  

  14. Some extension of bigravity Invited International conference

    Shin'ichi Nojiri

    Quantum Field Theory and Gravity (QFTG ’14)  2014.8  Tomsk State Pedagogical University

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    Event date: 2014.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tomsk   Country:Russian Federation  

  15. F(R) bigravity Invited

    Petrov Winter School, 2014  2014 

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    Event date: 2014.2

    Language:English  

    Country:Russian Federation  

  16. F(R) bigravity Invited International conference

    3rd International Workshop on Dark Matter, Dark Energy and Matter- Antimatter Asymmetry  2012.12.28 

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    Event date: 2012.12

    Language:English  

    Venue:Hsinchu and Taipei   Country:Taiwan, Province of China  

  17. Reconstruction of dark energy models International conference

    Cosmology, the Quantum Vacuum, and Zeta Functions 

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    Event date: 2010.3

    Language:English   Presentation type:Oral presentation (invited, special)  

  18. Modified Gravity as a Model of Dark Energy International conference

    International Workshop on Dark Matter, Dark Energy and Matter-Antimatter Asymmetry 

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    Event date: 2009.11

    Language:English   Presentation type:Oral presentation (invited, special)  

  19. Recent Topics in f(R) Gravity International conference

    Indo-Japan Workshop on Cosmology 

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    Event date: 2008.12

    Language:English   Presentation type:Oral presentation (invited, special)  

  20. Can F(R) - gravity be a viable model?

    JGRG17 

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    Event date: 2007.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

    We review on the viability of $F(R)$-gravity. We show that recent cosmic acceleration, radiation/matter-dominated epoch and inflation could be realized in the framework of $F(R)$-gravity in the unified way. For some classes of $F(R)$-gravity, the correction to the Newton law is extremely small and there is no so-called matter instability (the very heavy positive mass for additional scalar degree of freedom is generated). The reconstruction program in modified gravity is also reviewed and it is d

  21. Modified Gauss-Bonnet gravity as dark energy International conference

    QFTG'07 

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    暗黒エネルギーの模型として弦理論の補正として現れるガウス=ボンネ項をアインシュタイン=ヒルベルト作用に付け加えた模型を考え,ゴーストを導入することなしにファントム宇宙が実現できることや任意の宇宙膨張の時間発展が記述できることを示した.

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Research Project for Joint Research, Competitive Funding, etc. 2

  1. Particle physics models of inflation and dark energy and their observational constraints

    2007.6 - 2009.3

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    Grant type:Competitive

  2. 暗黒エネルギーの素粒子理論からの解明

    2006 - 2008.3

KAKENHI (Grants-in-Aid for Scientific Research) 2

  1. Verification of Extended Gravity

    Grant number:18K03615  2018.4 - 2022.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Nojiri Shin'ichi

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    Authorship:Principal investigator 

    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    I have studied several extended gravity models and investigated if these models can be realistic. In parallel, I constructed models satisfying several constraints obtained from observations and theoretical consistencies, especially from the dark energy problem and the inflation in the early universe. I have also investigated the propagation of the gravitational waves in several models. In other works, I have investigated what kind of black hole solutions can
    be possible in the framework of extended gravities and I have found new and exotic solutions. I also proposed models for solving the Hubble tension problem and investigated neutron stars' effect and tried to clarify how the effect can be approved.

  2. Theoretical modeling of dark energy and its observational verification

    Grant number:15H05890  2015.6 - 2020.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Sugiyama Naoshi

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    Authorship:Coinvestigator(s) 

    Observational Constraints on dark energy models were obtained using the latest astronomical observational data, mainly from Planck. Various theoretically motivated dark energy models were proposed, and parameter regions of the theory that satisfy current observations were obtained. We developed a cosmological perturbation theory in models with dark energy and dark matter interactions and found that such models slow down the formation of large scale structure of the universe. We examined the effect of density fluctuations of dark energy on the number density and size of voids formed in the large-scale structure of the universe, and showed that the Alcock-Pacynski test allows unbiased constraints on the energy density of dark energy and the equation of state.

 

Teaching Experience (On-campus) 5

  1. Colloquium Gravity and Particle Cosmology B

    2022

  2. Colloquium Gravity and Particle Cosmology 2

    2022

  3. 数理物理学Ⅱ演習

    2022

  4. 数理物理学Ⅰ演習

    2022

  5. Fundamentals of Physics I

    2011

 

Social Contribution 3

  1. 素粒子論のこの 50 年、そして未来 ― 益川さんを偲んで

    Role(s):Presenter, Planner, Organizing member

    京都大学基礎物理学研究所、京都大学理学研究科物理学・宇宙物理学専攻、KMI  素粒子論のこの 50 年、そして未来 ― 益川さんを偲んで  2022.3

  2. 小林・益川理論50周年 -益川さんを偲んで

    Role(s):Planner, Organizing member

    名古屋大学 KMI  小林・益川理論50周年 -益川さんを偲んで  2022.1

  3. 一宮高校SSH「課題研究交流会」

    Role(s):Advisor

    一宮高校  一宮高校SSH「課題研究交流会」  2021.8