公益社団法人　応用物理学会　超伝導分科会   幹事長  

2007.4 - 2009.3   

50-GFLOPS floating-point adder and multiplier using gate-level-pipelined single-flux-quantum logic with frequency-increased clock distribution Reviewed

Nagaoka Ikki, Kashima Ryota, Tanaka Masamitsu, Kawakami Satoshi, Tanimoto Teruo, Yamashita Taro, Inoue Koji, Fujimaki Akira

  Vol. 33 ( 4 )   2023.6

Execution of stored programs by a rapid single-flux-quantum random-access-memory-embedded bit-serial microprocessor using 50-GHz clock frequency Reviewed

Tanaka, M; Sato, R; Fujimaki, A; Takagi, K; Takagi, N

APPLIED PHYSICS LETTERS   Vol. 122 ( 19 )   2023.5

Superconductor digital circuits with π junctions alone Reviewed

APPLIED PHYSICS LETTERS   Vol. 122 ( 16 )   2023.4

Direct observations of π-leaps of superconducting phase differences in π-junction-based SQUIDs

Takeshita, Y; Li, F; Higashi, M; Tanaka, M; Yamashita, T; Fujimaki, A

SUPERCONDUCTOR SCIENCE & TECHNOLOGY   Vol. 36 ( 4 )   2023.4

A High-Throughput Multiply-Accumulate Unit With Long Feedback Loop Using Low-Voltage Rapid Single-Flux Quantum Circuits

Nagaoka, I; Kashima, R; Ishida, K; Tanaka, M; Yamashita, T; Ono, T; Inoue, K; Fujimaki, A

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 33 ( 3 )   2023.4

Weak spin-flip scattering in Pd89Ni11 interlayer of NbN-based ferromagnetic Josephson junctions Reviewed

D. Pham, R. Sugimoto, K. Oba, Y. Takeshita, F. Li, M. Tanaka, T.Yamashita, A. Fujimakiaki

Scientific Reports   Vol. 12 ( 1 ) page： 6863   2022.4

Design of Variable Bit-Width Arithmetic Unit Using Single Flux Quantum Device

Ishikawa, I; Nagaoka, I; Kashima, R; Ishida, K; Fukumitsu, K; Oka, K; Tanaka, M; Kawakami, S; Tanimoto, T; Ono, T; Fujimaki, A; Inoue, K

2022 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 22)     page： 3547 - 3551   2022

Planarized Nb 4-Layer Fabrication Process for Superconducting Integrated Circuits and Its Fabricated Device Evaluation

Nagasawa Shuichi, Tanaka Masamitsu, Takeuchi Naoki, Yamanashi Yuki, Miyajima Shigeyuki, China Fumihiro, Yamae Taiki, Yamazaki Koki, Somei Yuta, Sega Naonori, Mizugaki Yoshinao, Myoren Hiroaki, Terai Hirotaka, Hidaka Mutsuo, Yoshikawa Nobuyuki, Fujimaki Akira

IEICE TRANSACTIONS ON ELECTRONICS   Vol. E104C ( 9 ) page： 435 - 445   2021.9

64-GHz Datapath Demonstration for Bit-Parallel SFQ Microprocessors Based on a Gate-Level-Pipeline Structure Reviewed

R. Kashima, I. Nagaoka, M. Tanaka, T. Yamashita, and A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 5 )   2021.8

High-Speed Memory Driven by SFQ Pulses Based on 0-pi SQUID Reviewed

Y. Takeshita, F. Li, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 5 )   2021.8

Investigation of Timing Parameters in Single-Flux-Quantum Circuits Using Low Critical-Current Junctions and Low Bias Voltages

Kuniyoshi Manami, Murase Ken, Nagaoka Ikki, Sano Kyosuke, Tanaka Masamitsu, Yamashita Taro, Fujimaki Akira

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 5 )   2021.8

Demonstration of Interface Circuits Between Half- and Single-Flux-Quantum Circuits

Hasegawa Daiki, Takeshita Yuto, Li Feng, Sano Kyosuke, Tanaka Masamitsu, Yamashita Taro, Fujimaki Akira

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 5 )   2021.8

Demonstration of a 52-GHz Bit-Parallel Multiplier Using Low-Voltage Rapid Single-Flux-Quantum Logic

Nagaoka Ikki, Ishida Koki, Tanaka Masamitsu, Sano Kyosuke, Yamashita Taro, Ono Takatsugu, Inoue Koji, Fujimaki Akira

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 5 )   2021.8

Synchronous SFQ Address Encoder for Superconductor Detector Arrays Reviewed

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 4 )   2021.6

Low-power high-speed half-flux-quantum circuits driven by low bias voltages Reviewed

F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, and A. Fujimaki

Superconductor Science and Technology   Vol. 34 ( 2 ) page： 2025013   2021.2

SFQ Parallel Encoders Promising for Video ImagingWith Superconductor Stripline Detectors Reviewed

M.Tanaka, M.Kozaka, K.Kamiya, K.Usenmez,E.Aydo gan, S.Razmkhah, A.Bozbey, and A.Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 31 ( 1 ) page： 1300106   2021.1

π phase shifter based on NbN-based ferromagnetic Josephson junction on a silicon substrate Reviewed

T.Yamashita, S.Kim, H.Kato, W.Qiu, K.Semba, A.Fujimaki, H.Terai

Nature,Scientific Reports   Vol. 10 ( 1 ) page： 13687   2020.8

32 GHz 6.5 mW Gate-Level-Pipelined 4-bit Processor using Superconductor Single-Flux-Quantum Logic Reviewed

K. Ishida, M. Tanaka, I. Nagaoka, T. Ono, S. Kawakami, T. Tanimoto, A. Fujimaki , and K. Inoue

2020 IEEE SYMPOSIUM ON VLSI CIRCUITS     2020

Fundamental study on the nanocryotron properties by the numerical calculation Reviewed

M. Inoue, K. Izaki, Y. Goto, K. Sano, T. Yamashita, M. Tanaka, and A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 29 ( 5 ) page： 1800604   2019.8

Fabrication of NbTiN Josephson Junctions With Thermally Oxidized Hf Tunnel Barriers Reviewed

H. Akaike, K. Munemoto, Y. Sakakibara, and A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 29 ( 5 )   2019.8

Relaxation method in description of RAM memory cell in RSFQ computer

Pomorski Krzysztof Dominik, Akaike Hiroyuki, Fujimaki Akira, Rusek Krzysztof

COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING   Vol. 38 ( 1 ) page： 395-414   2019.1

A 48GHz 5.6mW Gate-Level-Pipelined Multiplier Using Single-Flux Quantum Logic

Nagaoka Ikki, Tanaka Masamitsu, Inoue Koji, Fujimaki Akira

2019 IEEE INTERNATIONAL SOLID- STATE CIRCUITS CONFERENCE (ISSCC)   Vol. 62   page： 460 - +   2019

Magnetic Josephson Junctions on Nb Four-layer Structure for Half Flux Quantum Circuits

Hasegawa Daiki, Takeshita Yuto, Sano Kyosuke, Tanaka Masamitsu, Fujimaki Akira, Yamashita Taro

2019 IEEE INTERNATIONAL SUPERCONDUCTIVE ELECTRONICS CONFERENCE (ISEC)     2019

Demonstration of an Energy-Efficient, Gate-Level-Pipelined 100 TOPS/W Arithmetic Logic Unit Based on Low-Voltage Rapid Single-Flux-Quantum Logic

Nagaoka Ikki, Tanaka Masamitsu, Sano Kyosuke, Yamashita Taro, Fujimaki Akira, Inoue Koji

2019 IEEE INTERNATIONAL SUPERCONDUCTIVE ELECTRONICS CONFERENCE (ISEC)     2019

超伝導単一磁束量子回路による50 GHzビット並列演算マイクロプロセッサに向けた要素回路設計 Invited Reviewed

田中雅光, 佐藤諒, 石田浩貴, 畑中湧貴, 松井裕一, 小野貴継, 井上弘士, 藤巻朗

電子情報通信学会論文誌C   Vol. 101-C (10)   page： 389-399   2018.9

Energy/Space-Efficient Rapid Single-Flux-Quantum Circuits by Using pi-Shifted Josephson Junctions

Kamiya Tomohiro, Tanaka Masamitsu, Sano Kyosuke, Fujimaki Akira

IEICE TRANSACTIONS ON ELECTRONICS   Vol. E101C ( 5 ) page： 385-390   2018.5

Thermally Assisted Superconductor Transistors for Josephson-CMOS Hybrid Memories

Sano Kyosuke, Suzuki Masato, Maruyama Kohei, Taniguchi Soya, Tanaka Masamitsu, Fujimaki Akira, Inoue Masumi, Yoshikawa Nobuyuki

IEICE TRANSACTIONS ON ELECTRONICS   Vol. E101C ( 5 ) page： 370-377   2018.5

Trend and Perspective of Microprocessors Based on Single-flux-quantum Logic

Journal of Cryogenics and Superconductivity Society of Japan   Vol. 52 ( 5 ) page： 323-331   2017.10

Neutron detection using the superconducting Nb-based current-biased kinetic inductance detector

Shishido Hiroaki, Yamaguchi Hiroyuki, Miki Yuya, Miyajima Shigeyuki, Oikawa Kenichi, Harada Masahide, Hidaka Mutsuo, Oku Takayuki, Arai Masatoshi, Fujimaki Akira, Ishida Takekazu

SUPERCONDUCTOR SCIENCE & TECHNOLOGY   Vol. 30 ( 9 )   2017.9

Josephson-CMOS Hybrid Memory With Nanocryotrons Reviewed

M. Tanaka, M. Suzuki, G. Konno, Y. Ito, A. Fujimaki, and N. Yoshikawa

IEEE Transactions on Applied Superconductivity   Vol. 27 ( 4 ) page： Article Number 1800904   2017.6

High-Speed Operation of Random-Access-Memory-Embedded Microprocessor With Minimal Instruction Set Architecture Based on Rapid Single-Flux-Quantum Logic Reviewed

R. Sato, Y. Hatanaka, Y. Ando, M. Tanaka, A. Fujimaki, K. Takagi, and N. Takagi

IEEE Transactions on Applied Superconductivity   Vol. 27 ( 4 ) page： Article Number 1300505   2017.6

Study on the Force and Potential for the Vortex Motion Around the Concave Film Edge by the Numerical Calculation Reviewed

M. Inoue, S. Mizoguchi, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 27 ( 4 ) page： Article Number 1501004   2017.6

Investigation Into the Individual Configuration of Superconducting Phase Shift Elements Made of Ferromagnetic Patterns for Reconfigurable Circuits Reviewed

S. Taniguchi, H. Ito, K. Ishikawa, S. Kurokawa, M. Tanaka, H. Akaike, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 27 ( 4 ) page： Article Number 1501204   2017.6

Fabrication of superconductor-ferromagnet-insulator-superconductor Josephson junctions with critical current uniformity applicable to integrated circuits

Ito Hiroshi, Taniguchi Soya, Ishikawa Kouta, Akaike Hiroyuki, Fujimaki Akira

APPLIED PHYSICS EXPRESS   Vol. 10 ( 3 )   2017.3

Neutron flux spectrum revealed by Nb-based current-biased kinetic inductance detector with a B-10 conversion layer Reviewed

S. Miyajima, H. Shishido, Y. Narukami, N. Yoshioka, A. Fujimaki, M. Hidaka, K. Oikawa, M. Harada, T. Oku, M. Arai

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 842   page： 71-75   2017.1

Neutron flux spectrum revealed by Nb-based current-biased kinetic inductance detector with a B-10 conversion layer

Miyajima Shigeyuki, Shishido Hiroaki, Narukami Yoshito, Yoshioka Naohito, Fujimaki Akira, Hidaka Mutsuo, Oikawa Kenichi, Harada Masahide, Oku Takayuki, Arai Masatoshi, Ishida Takekazu

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   Vol. 842   page： 71-75   2017.1

Justification of Canonical Quantization for Various Devices Using Josephson Effect

Krzysztof Pomorski, Bednorz Adam, Fujimaki Akira

6TH WARSAW SCHOOL OF STATISTICAL PHYSICS     page： 112 - 112   2017

Development of an Optimizer for Vortex Transitional Memory Using Particle Swarm Optimization Reviewed

MA. Karamuftuoglu, S. Demirhan, Y. Komura, ME. Celik, M. Tanaka, A. Bozbey, A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 26 ( 8 ) page： 記事番号: 1301606   2016.12

Development of a neutron imager based on superconducting detectors Reviewed

S. Miyajima, H. Yamaguchi, H. Nakayama, H. Shishido, A. Fujimaki, M. Hidaka, M. Harada, K. Oikawa, T. Oku, M. Arai

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 530   page： 98-100   2016.11

Fabrication of NbTiN/Al-AlNX/NbTiN Josephson Junctions for Superconducting Circuits Operating Around 10 K Reviewed

H. Akaike, S. Sakamoto, K. Munemoto, A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 26 ( 5 )   2016.8

High-Density Shift-Register-Based Rapid Single-Flux-Quantum Memory System for Bit-Serial Microprocessors Reviewed

M. Tanaka, R. Sato, Y. Hatanaka, A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 26 ( 5 ) page： 記事番号: 1301005   2016.8

Design and Demonstration of an 8-bit Bit-Serial RSFQ Microprocessor: CORE e4 Reviewed

Y. Ando, R. Sato, M. Tanaka, K. Takagi, N. Takagi, A. Fujimaki

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 26 ( 5 ) page： 記事番号: 1301205   2016.8

Development of an Advanced Circuit Model for Superconducting Strip Line Detector Arrays Reviewed

A. Bozbey, Y. Kita, K. Kamiya, M. Kozaka, M. Tanaka, T. Ishida, A. Fujimaki

IEICE TRANSACTIONS ON ELECTRONICS   Vol. E99C ( 6 ) page： 676-682   2016.6

4-bit Bit-Slice Arithmetic Logic Unit for 32-bit RSFQ Microprocessors Reviewed

GM. Tang, K. Takata, M. Tanaka, A. Fujimaki, K. Takagi, N. Takagi

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 26 ( 1 ) page： 記事番号: 1300106   2016.1

Neutron detection using a current biased kinetic inductance detector Reviewed

H. Shishido, S. Miyajima, Y. Narukami, K. Oikawa, M. Harada, T. Oku, M. Arai, M. Hidaka, A. Fujimaki, T. Ishida

APPLIED PHYSICS LETTERS   Vol. 107 ( 23 ) page： 記事番号: 232601   2015.12

Quasiparticle-mediated spin Hall effect in a superconductor

T. Wakamura, H. Akaike, Y. Omori, Y. Niimi, S. Takahashi, A. Fujimaki, S. Maekawa, and Y. Otani

Nature Materials   Vol. 14 ( 7 ) page： 675–678   2015.7

Rapid Single-Flux-Quantum Circuits Fabricated Using 20-kA/cm2 Nb/AlOx/Nb Process Reviewed

M. Tanaka, M. Kozaka, Y. Kita, A. Fujimaki, S. Nagasawa, M. Hidaka

IEEE Trans. on Appl.Supercond.   Vol. 25 ( 3 ) page： Art. No. 1100304   2015.6

Toward Neutron Radiogaphy Using Two Arrays of Nb-Based Current-Biased Kinetic Inductance Detectors With B-10 Converter Sandwiched In-Between Reviewed

T.Ishida, S.Miyajima, Y.Narukami, N.Yoshioka, H.Shishido, M.Hidaka, A.Fujimaki

IEEE Trans. on Appl.Supercond.   Vol. 25 ( 3 ) page： 2401304   2015.6

High-Speed Demonstration of Bit-Serial Floating-Point Adders and Multipliers Using Single-Flux-Quantum Circuits Reviewed

XZ.Peng, QY.Xu, F.Kato, Y.Yamanashi, N.Yoshikawa, A.Fujimaki, N.Takagi, K.Takagi

IEEE Trans. on Appl.Supercond.   Vol. 25 ( 3 ) page： 1301106   2015.6

20 ps Pulsed Laser Irradiation to Current-Biased Kinetic Inductance Detector Made of Nb Nanowires Reviewed

Y.Narukami, S.Miyajima, A.Fujimaki, M.Hidaka, T.Ishida

IEEE Trans. on Appl.Supercond.   Vol. 25 ( 3 ) page： 2400904   2015.6

Cryogenic ferromagnetic patterns with controlled magnetization for superconducting phase-shift elements Reviewed

S. Taniguchi, H. Ito, K. Ishikawa,H. Akaike, A. Fujimaki

JAPANESE JOURNAL OF APPLIED PHYSICS   Vol. 54 ( 4 ) page： 記事番号: 043101   2015.4

Cryogenic ferromagnetic patterns with controlled magnetization for superconducting phase-shift elements Reviewed

S. Taniguchi, H. Ito, K. Ishikawa, H. Akaike, A. Fujimaki

Japanese Journal of Applied Physics   Vol. 54   page： No. 043101   2015.3

Toward Mega-pixel Neutron Imager Using Current-Biased Kinetic Inductance Detectors of Nb Nanowires With B-10 Converter Reviewed

T.Ishida, N.Yoshioka, Y.Narukami, H.Shishido, S.Miyajima, A.Fujimaki, S.Miki, Z.Wang, M.Hidaka

Journal of Low Temperature Physics   Vol. 176 ( 3-4 ) page： 216-221   2014.8

Large-Scale Integrated Circuit Design Based on a Nb Nine-Layer Structure for Reconfigurable Data-Path Processors Reviewed

A. Fujimaki, M. Tanaka, R. Kasagi, K. Takagi, M. Okada, Y. Hayakawa, K. Takata, H. Akaike, N. Yoshikawa, S. Nagasawa, K. Takagi, N. Takagi

IEICE Trans. Electron.   Vol. 97-C ( 3 ) page： 157-165   2014.3

Effects of magnetic nanoparticle films on the electrical characteristics of dc superconducting quantum interference devices Reviewed

T. Okumura, H. Ito, S. Yano, S. Taniguchi, H. Akaike, A. Fujimaki

Japanese Journal of Applied Physics   Vol. 53   page： 10.7567/JJAP.53.033101   2014.3

Nb 9-Layer Fabrication Process for Superconducting Large-Scale SFQ Circuits and Its Process Evaluation Reviewed

S. Nagasawa, K. Hinode, T. Satoh, M. Hidaka, H. Akaike, A. Fujimaki, N. Yoshikawa, K. Takagi, N. Takagi

IEICE Trans. Electron.   Vol. 97-C ( 3 ) page： 132-140   2014.3

A Reconfigurable Data-Path Accelerator Based on Single Flux Quantum Circuits Reviewed

H. Kataoka, H. Honda, F. Mehdipour, N. Yoshikawa, A. Fujimaki, H. Akaike, N. Takagi, K. Murakami

IEICE Trans. Electron.   Vol. 97-C ( 3 ) page： 141-148   2014.3

Design and High-Speed Demonstration of Single-Flux-Quantum Bit-Serial Floating-Point Multipliers Using a 10kA/cm2 Nb Process Reviewed

X. Peng, Y. Yamanashi, N. Yoshikawa, A. Fujimaki, N. Takagi, K. Takagi, M. Hidaka

IEICE Trans. Electron.   Vol. 97-C ( 3 ) page： 188-193   2014.3

High-Speed Operation of 0.25-mV RSFQ Arithmetic Logic Unit Based on 10-kA/cm2 Nb Process Technology Reviewed

M. Tanaka, A. Kitayama, M. Okada, T. Kouketsu, T. Takinami, M. Ito, A. Fujimaki

IEICE Trans. Electron.   Vol. 97-C ( 3 ) page： 166-172   2014.3

Current Sensitivity Enhancement of a Quasi-One-Junction SQUID Comparator as an Input Circuit of SFQ Readout Circuit for a Superconductor Detector Reviewed

S. Miyajima, K. Ito, Y. Kita, T. Ishida, A.Fujimaki

J. Low Temp. Phys.   Vol. 176 ( 3-4 ) page： 465-469   2014.2

16-Bit Wave-Pipelined Sparse-Tree RSFQ Adder Reviewed

M. Dorojevets, C. L. Ayala, N. Yoshikawa, A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

8-Bit Asynchronous Sparse-Tree Superconductor RSFQ Arithmetic-Logic Unit With a Rich Set of Operations Reviewed

M. Dorojevets, C. L. Ayala, N. Yoshikawa, A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

20-GHz 8 × 8-bit Parallel Carry-Save Pipelined RSFQ Multiplier Reviewed

M. Dorojevets, A. K. Kasperek, N. Yoshikawa, A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

Current-Biased Kinetic Inductance Detector Using MgB2 Nanowires for Detecting Neutrons Reviewed

N. Yoshioka, I. Yagi, H. Shishido, T. Yotsuya, S. Miyajima, A. Fujimaki, S. Miki, Z. Wang, T. Ishida

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

High-Throughput RSFQ Signal Processor for a Neutron Diffraction System with Multiple MgB2 Detectors Reviewed

S. Miyajima, T. Kusumoto, K. Ito, Y. Akita, I. Yagi, N. Yoshioka, T. Ishida, S. Miki, Z. Wang, and A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

Characterization of NbN Tunnel Junctions With Radical-Nitrided AlNx Barriers Reviewed

H. Akaike, T. Funai, N. Naito, and A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

Low-Energy Consumption RSFQ Circuits Driven by Low Voltages Reviewed

M. Tanaka, A. Kitayama, T.Kouketsu, M. Ito, and A. Fujimaki

IEEE Trans. on Appl. Supercond.   Vol. 23 ( 3 )   2013.6

Experimental Demonstration and Numerical Analysis of Microampere Gray Zone Width with Enhanced Operating Margin in Shunted Quasi-One-Junction Superconducting Quantum Interference Device Comparators Reviewed

S. Miyajima, T. Ortlepp, H. Toepfer, A. Bozbey, and A. Fujimaki

Jpn. J. Appl. Phys.   Vol. 52   2013.2

Experimental demonstration of an operand routing network prototype employing clock control and data synchronization Reviewed

I. Kataeva, H. Akaike, A. Fujimaki, N. Yoshikawa, and N. Takagi

Physics Procedia   Vol. 36   page： 349-353   2012.9

量子限界への扉を開くジョセフソン効果　−発見から50年，その基礎と応用−　4. ジョセフソン素子のディジタル応用

藤巻朗

電子情報通信学会誌   Vol. 95 ( 8 ) page： 746-749   2012.8

Josephson comparator with modified dynamic behavior for improved sensitivity Reviewed

T. Ortlepp, S. Miyajima, H. Toepfer and A. Fujimaki

Journal of Applied Physics   Vol. 111 ( 12 ) page： 123901   2012.6

Ratchet Effect of Single Vortex Motion in Superconducting Asymmetrical Nanobridges Reviewed

K. Kajino, K. Fujita, B. An, M. Inoue, and A. Fujimaki

Japanese Journal of Applied Physics   Vol. 51 ( 5 ) page： 10.1143/JJAP.51.053101   2012.5

18-GHz, 4.0-aJ/bit Operation of Ultra-Low-Energy Rapid Single-Flux-Quantum Shift Registers Reviewed

M. Tanaka, M. Ito, A. Kitayama, T. Kouketsu, and A. Fujimaki

Japanese Journal of Applied Physics   Vol. 51 ( 5 ) page： 10.1143/JJAP.51.053102   2012.5

100-GHz Single-Flux-Quantum Bit-Serial Adder based on 10kA/cm2 Niobium Process Reviewed

M. Tanaka, H. Akaike, A. Fujimaki, Y. Yamanashi, N. Yoshikawa, S. Nagasawa, K. Takagi, and N. Takagi

IEEE Transactions on Applied Superconductivity   Vol. 21 ( 3 (part1) ) page： 792-796   2011.6

Clock Line Considerations for an SFQQ Large Scale Reconfigurable Data Paths Processor Reviewed

I. Kataeva, H. Akaike, A. Fujimaki, N. Yoshikawa, S. Nagasawa, and N. Takagi

IEEE Transactions on Applied Superconductivity   Vol. 21 ( 3 (part1) ) page： 809-813   2011.6

Design and Implementation of Component Circuits of an SFQ Half-Precision Floating-Point Adder using 10kA/cm2 Nb Process Reviewed

T. Kainuma, Y. Shimamura, F. Miyaoka, Y. Yamanashi, N. Yoshikawa, A. Fujimaki, K. Takagi, N. Takagi, and S. Nagasawa

IEEE Transactions on Applied Superconductivity   Vol. 21 ( 3 (part1) ) page： 827-830   2011.6

The Effect of Magnetic Nanoparticles on Inductances for SFQ Device Application Reviewed

H. Akaike, K. Shigehara, T. Okumura, S. Yano, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 21 ( 3 (part1) ) page： 131-134   2011.6

Proposal of a Compact Neutron Diffraction System with a Single-Flux-Quantum Signal Processor Invited Reviewed

A. Fujimaki, I. Nakanishi, S. Miyajima, K. Arai, Y. Akita, and T. Ishida

IEICE Transactions on Electronics   Vol. E94-C ( 3 ) page： 254-259   2011.3

Suppression of Magnetic Flux Trapping by Moats formed in NbN Ground Planes Reviewed

N. Mitamura, N. Naito, H. Akaike, and A. Fujimaki

Applied Physics Express   Vol. 4 ( 1 ) page： No.013102   2010.12

All MgB₂ Josephson Junctions with Amorphous Boron Barriers Invited Reviewed

N. Mitamura, C. Maruyama, H. Akaike, A. Fujimaki, R. Ishii, Y. Niihara, and M. Naito

IEICE Transactions on Electronics   Vol. E93-C ( 4 ) page： 468-472   2010

100 GHz Demonstrations Based on the Single-Flux-Quantum Cell Library for the 10 kA/cm(2) Nb Multi-Layer Process Invited Reviewed

Y. Yamanashi, T. Kainuma, N. Yoshikawa, I. Kataeva, H. Akaike, A. Fujimaki, M. Tanaka, N. Takagi, S. Nagasawa, and M. Hidaka

IEICE Transactions on Electronics   Vol. E93-C ( 4 ) page： 440-444   2010

Automated Passive-Transmission-Line Routing Tool for Single-Flux-Quantum Circuits Based on A Algorithm Invited Reviewed

M. Tanaka, K. Obata, Y. Ito, S. Takeshima, M. Sato, K. Takagi, N. Takagi, H. Akaike, and A. Fujimaki

IEICE Transactions on Electronics   Vol. E93-C ( 4 ) page： 435-439   2010

(超電導エレクトロニクス最新の動向）6.単一磁束量子を用いた情報処理回路

藤巻　朗、　田中雅光

電機学会誌   Vol. 130 ( 3 ) page： 159-162   2010

The preparation process of plasma-nitrided barriers in NbN Josephson junctions for digital applications Reviewed

Y. Nagai, H. Akaike, R. Kanada, N. Naito, and A. Fujimaki

SUPERCONDUCTOR SCIENCE & TECHNOLOGY   Vol. 22 ( 11 ) page： 記事番号: 114015   2009.11

Design of fast digital-serial adderss using SFQ logic circuits Reviewed

H. Park, Y. Yamanashi, N. Yoshikawa, M. Tanaka, and A. Fujimaki

IEICE ELECTRONICS EXPRESS   Vol. 6 ( 19 ) page： 1408-1413   2009.10

*Operation of Toggle Flip-Flop Circuits Up to 500 GHz Based on Vertically-Stacked High-Temperature Superconductor Josephson Junctions Reviewed

T. Kimura, K. Kajino, M. Watanabe, Y. Horii, M. Inoue, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 127-130   2009.6

Planarization Process for Fabricating Multi-Layer Nb Integrated Circuits Incorporating Top Active Layer Reviewed

T. Satoh, K. Hinode, S. Nagasawa, Y. Kitagawa, M. Hidaka, N. Yoshikawa, H. Akaike, A. Fujimaki, K. Takagi, and N. takagi

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 167-170   2009.6

Preparation of Narrowed YBa2Cu3O7-x Nanobridges Down to 30 nm With Reduced Degradation Reviewed

K. Kajino, T. Kimura, Y. Horii, M. Watanabe, M. Inoue, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 178-182   2009.6

Self-Shunted NbN Junctions With NbNx/AlN Bilayered Barriers for 4 K Operation Reviewed

R. Kanada, Y. Nagai, H. Akaike, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 249-252   2009.6

Research on Effective Moat Configuration for Nb Multi-Layer Device Structure Reviewed

K. Fujiwara, S. Nagasawa, Y. Hashimoto, M. Hidaka, N. Yoshikawa, M. Tanaka, H. Akaike, A. Fujimaki, K. Takagi, and N. Takagi

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 603-606   2009.6

Design and Implementation and On-Chip High-Speed Test of SFQ Half-Precision Floating-Point Adders Reviewed

H. Park, Y. Yamanashi, K. Takemoto, N. Yoshikawa, M. Tanaka, K. Obata, Y. Ito, A. Fujimaki, N. Takagi, K. Takagi, and S. Nagasawa

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 634-639   2009.6

Design, Implementation and On-Chip High-Speed Test of SFQ Half-Precision Floating-Point Multiplier Reviewed

H. Hara, K. Obata, H. Park, Y. Yamanashi, K. Takemoto, N. Yoshikawa, M. Tanaka, A. Fujimaki, N. Takagi, K. Takagi, and S. Nagasawa

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   Vol. 19 ( 3 ) page： 657-660   2009.6

Analysis of precursors for crystal growth of YBaCuO thin films in magnetron sputtering deposition Reviewed

K. Fukaya, K. Sasaki, JS Gao, T. Kimura, M. Watanabe, M. Inoue, A. Fujimaki, and H. Sugai

Thin Solid Films   Vol. 517 ( 8 ) page： 2762-2766   2009.2

The Effects of a DC Power Layer in a 10-Nb-Layer Device for SFQ LSIs Reviewed

H. Akaike, K. Shigehara, A. Fujimaki, T. Satoh, K. Hinode, S. Nagasawa, and M. Hidaka

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 594-597   2009

Design of single flux quantum cells for a 10-Nb-layer process Reviewed

H. Akaike, M. Tanaka, K. Takagi, I. Kataeva, R. Kasagi, A. Fujimaki, M. Igarashi, H. Park, Y. Yamanashi, N. Yoshikawa, K. Fujiwara, S. Nagasawa, M. Hidaka, and N. Takagi

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 469 ( 15-20 ) page： 1670-1673   2009

New Nb multi-layer fabrication process for large-scale SFQ circuits Reviewed

S. Nagasawa, T. Satoh, K. Hinode, Y. Kitagawa, M. hidaka, H. Aakaike, A. Fujimaki, K. Takagi, N. Takagi, and N. Yoshikawa

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 469 ( 15-20 ) page： 1578-1584   2009

Control of return current flows in the single-flux-quantum circuits using positive/negative bias supply lines Reviewed

M. Tanaka, H. Akaike, and A. Fujimaki

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 469   page： 1666-1669   2009

*Single-Flux-Quantum Circuit Based Readout System for Detector Arrays by Using Time to Digital Conversion Reviewed

A. Bozbey, S. Miyajima, H. Akaike, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 509-513   2009

Current Resolution of a single-Flux-Quantum Readout Circuit Based on Current-to-Time Conversion Toward a Flux Qubit System Reviewed

S. Nakamura, H. Numabe, A. Bozbey, and A. Fujimaki,

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 973-976   2009

An Operand Routing Network for an SFQ Reconfigurable Data-Paths Processor Reviewed

I. Kataeva, H. Akaike, A. Fujimkai, N. Yoshikawa, N. takagi, K. Inoue, H. Honda, and K. Murakami

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 665-669   2009

A High-throughput Single-Flux Quantum Floating-Point Serial Divider Using the Signed-Digit Representation Reviewed

M. Tanaka, K. Obata, K. Takagi, N. Takagi, A. Fujimaki, and N. Yoshikawa

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 653-656   2009

SFQ Propagation Properties in Passive Transmission Lines Based on a 10-Nb-Layer Structure Reviewed

K. Takagi, M. Tanaka, S. Iwasaki, R. Kasagi, I. Kataeva, S. Nagasawa, T. Satoh, H. Akaike, and A. Fujimaki

IEEE Transactions on Applied Superconductivity   Vol. 19 ( 3 ) page： 617-620   2009

Novel serial-parallel converter using SFQ logic circuits Reviewed

H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, A. Fujimaki, and N.Takagi

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   Vol. 468 ( 15-20 ) page： 1977-1982   2008.9

Direct measurements of propagation delay of single-flux-quantum Circuits by time-to-digital converters Reviewed

K. Nakamiya, N. Yoshikawa, A. Fujimaki, H. Terai, and Y. Hashimoto

IEICE ELECTRONICS EXPRESS   Vol. 5 ( 9 ) page： 332-337   2008.5

Proposal of a Desk-Side Supercomputer with Reconfigurable Data-Paths Using Rapid Single-Flux-Qunatum Circuits Invited Reviewed

N. Takagi, K. Murakami, A. Fujimaki, N. Yoshikawa, K. Inoue and H. Honda

IEICE Trans. on Electron.   Vol. E91-C ( 3 ) page： 350-355   2008

*Bit-Serial Single Flux Quantum Microprocessor CORE Invited Reviewed

A. Fujimaki, M. Tanaka, T. Yamada, Y. Yamanashi, H. Park, and N. Yoshikawa

IEICE Trans. on Electron.   Vol. E91-C ( 3 ) page： 342-349   2008

高温超伝導積層ジョセフソン接合の展開 Invited Reviewed

藤巻　朗

応用物理   Vol. 77 ( 1 ) page： 31-35   2008

超伝導回路による超高速・低消費電力マイクロプロセッサの開発 Invited Reviewed

山梨 裕希，吉川 信行，田中 雅光，藤巻 朗

電気学会論文誌A   Vol. 128 ( 6 ) page： 369-372   2008

Design and Implementation of a Pipelined 8 Bit-Serial Single-Flux-Quantum Microprocessor with Cache Memories Reviewed

M. Tanaka, Y. Yamanashi, N. Irie, H. Park, S. Iwasaki, K. Takagi, K. Taketomi, A. Fujimaki, N. Yoshikawa, H. Terai, and S. Yorozu

Supercond, Sci. Technol.   Vol. 20 ( 11 ) page： 305-309   2007

*Design of a Reconfigurable Data-Path Prototype in the Single-Flux-Quantum Circuit Reviewed

S. Iwasaki, M. Tanaka, Y. Yamanashi, H. Park, H. Akaike, A. Fujimaki, N. Yoshikawa, N. Takagi, K. Murakami, H. Honda, and K. Inoue

Supercond. Sci. Technol.   Vol. 20 ( 11 ) page： 328-331   2007

*Fabrication of Inductively-Coupled Double-Josephson Junctions Using High-Temparature Superconductors Reviewed

T. Kimura, M. Watanabe, M. Sugimoto, Y. Fukai, M. Inoue, and A. Fujimaki

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 959-962   2007

Timing Jitter Measurement in Single-Flux-Quantum Circuits Based on Time-to-Digital Converters with High Time-Resolition Reviewed

M. Terabe, A. Sekiya, T. Yamada, and A. Fujimaki

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 552-555   2007

A New Design Approach for High-Throughput Arithmetic Circuits for Single-Flux-Quantum Microprocessors Reviewed

M. Tanaka, Y. Ymanashi, Y. Kamiya, A. Akimoto, N. Irie, H. Park, A. Fujimaki, N. Yoshikawa, H. Terai, and S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 516-519   2007

Bit-Error-Rate Measurements of RSFQ Shift Register Memories Reviewed

T. Hikida, K. Fujiwara, N. Yoshikawa, A. Fujimaki, H. Terai, and S.Yorozu

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 512-515   2007

Design and Implementation of a Fully Asynchronous SFQ Microprocessor: SCRAM2 Reviewed

Y. Nobumori, T. Nishigai, K. Nakamiya, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 478-481   2007

Design and Implementation of a Pipelned Bit-Serial SFQ Microprocessor, CORE1β Reviewed

Y. Yamanashi, M. Tanaka, A. Akimoto, H. Park, Y. Kamiya, N. Irie, N. Yoshikawa, A. Fujimaki, H. Terai, and Y. Hashimoto

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 474-477   2007

Effects of a DC-Power Layer Under a Ground Plane in SFQ Circuits Reviewed

H. Akaike, A. Fujimaki, T. Satohm, K. Hinode, S. Nagasawa, Y. Kitagawa, and M. Hidaka

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 466-469   2007

Diagnostic Test of Large-Scale SFQ Shift Register Reviewed

H. Terai, M. Tanaka, Y. Yamanashi, Y. Hashimoto, A. Fujimaki, N. Yoshikawa, and Z. Wang

IEEE Trans. Appl. Supercond.   Vol. 17 ( 2 ) page： 422-425   2007

Quantitative Models for the IcR Product in D-Wave Josephson Junctions Reviewed

T. Yokoyama, Y. Sawa, Y. Tanaka, A. Golubov, A. Maeda, and A. Fujimaki

Phys. Rev. B   Vol. 76 ( 5 ) page： Art.No.052508   2007

Improvement of Time Resolution of the Double-Oscillator Time-to-Digital Converter Using SFQ Circuits Reviewed

K. Nakamiya, T. Nishigai, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Physica C   Vol. 463-465   page： 1088-1091   2007

Quantitative Evaluation of Delay Time in the Single-Flux-Quantum Circuit Reviewed

S. Iwasaki, M. Tanaka, N. Irie, A. Fujimaki, N. Yoshikawa, H. Terai, and S. Yorozu

Physica C   Vol. 463-465   page： 1068-1071   2007

Effects of Surface Morphologies of Base Electrodes on the Qualities of Nb/AlOx/Nb Josephson Junctions with High Critical Densities Reviewed

N. Mehta, N. Mitamura, R. Kanada, H. Akaike, and A. Fujimaki

Physica C   Vol. 463-465   page： 975-978   2007

Effects of the Film Thickness of a Ground Plane in the SFQ Circuits with a Dc-Power Layer Reviewed

H. Akaike, A. Fujimaki, S. Nagasawa, Y. Kitagawa, and M. Hidaka

Supercond. Sci. Technol.   Vol. 20 ( 11 ) page： 336-340   2007

Study on the Optical Input Interface for Nb Single-Flux-Quantum Logic Circuits Reviewed

M. Inoue, T. Nishitani, A. Fujimaki, T. Yamada, K. Sawaki, I. Kawayama, and M. Tonouchi

Appl. Phys. Lett.   Vol. 89 ( 25 ) page： Art.No.252511   2006

High-Resolution Analog-to-Digital Converters toward Software-Defined-Radio Receivers Invited Reviewed

A. Fujimaki, Y. Nishido, and A. Sekiya

IEICE Trans. Electron.   Vol. E89-C ( 2 ) page： 113-118   2006

A Novel Splitter with Four Fan-Outs for Ballistic Signal Distribution in Single-Flux-Quantum Circuits up to 50 Gb/s Reviewed

T. Yamada and A. Fujimaki

Jpn. J. Appl. Phys. Pt.2   Vol. 45 ( 9 ) page： L262-L264   2006

Flexible Superconducting Passive Interconnects with 50-Gb/s Signal Transmissions in Single-Flux-Quantum Circuits Reviewed

T. Yamada, H. Ryoki, A. Fujimaki, and S. Yorozu

Jpn. J. Appl. Phys. Pt.1   Vol. 45 ( 2A ) page： 752-757   2006

The Influence of the Ground Current on Large-Scale Single-Flux-Quantum Circuits Reviewed

K. Fujiwara, T. Hikida, N. Yoshikawa, A. Fujimaki, S. Yorozu, and H. Terai

Supercond. Sci. Technol.   Vol. 19 ( 5 ) page： S362-S365   2006

Design of a Pipelined 8-Bit-Serial Single-Flux-Quantum Microprocessor with Multiple ALUs Reviewed

M. Tanaka, T. Kawamoto, Y. Yamanashi, Y. Kamiya, A. Akimoto, K. Fujiwara, A. Fujimaki, N. Yoshikawa, H. Terai and, S. Yorozu

Supercond. Sci. Technol.   Vol. 19 ( 5 ) page： S344-S349   2006

A New Design Approach for Control Circuits of Pipelined Single-Flux-Quantum Microprocessors Reviewed

Y. Yamanashi, A. Akimoto, N. Yoshikawa, M. Tanaka, T. Kawamoto, Y. Kamiya, A. Fujimaki, H. Terai, and S. Yorozu

Supercond. Sci. Technol.   Vol. 19 ( 5 ) page： S340-S343   2006

Demonstration of a 120 GHz Single-Flux-Quantum Shift Register Circuit Based on a 10 kA cm-2 Nb Process Reviewed

H. Akaike, T. Yamada, A. Fujimaki, S. Nagasawa, K. Hinode, T. Satoh, Y. Kitagawa, and M. Hidaka

Supercond. Sci. Technol.   Vol. 19 ( 5 ) page： S320-S324   2006

Dynamic Fluctuations in the Superconductivity of NbN Films from Microwave Conductivity Measurements Reviewed

T. Ohashi, H. Kitano, A. Maeda, H. Akaike and, A. Fujimaki

Phys. Rev. B   Vol. 73 ( 17 ) page： Art.No.174522   2006

Single-Flux-Quantum Integer Multiplier with Systolic Array Structure Reviewed

K. Obata, M. Tanaka, Y. Tashiro, Y. Kamiya, N. Irie, K. Takagi, N. Takagi, A. Fujimaki, N. Yoshikawa, H. Terai, and S. Yorozu

Physica C   Vol. 445-448   page： 1014-1019   2006

40-GHz Operation of a Single-Flux-Quantum (SFQ) 4×4 Switch Scheduler Reviewed

Y. Kameda, S. Yorozu, Y. Hashimoto, H. Terai, A. Fujimaki, and N. Yoshikawa

Physica C   Vol. 445-448   page： 1008-1013   2006

Signal Integrity in Large-Scale Single-Flux-Quantum Circuit Reviewed

H. Terai, S. Yorozu, A. Fujimaki, N. Yoshikawa, and Z. Wang

Physica C   Vol. 445-448   page： 1003-1007   2006

Vertically-Stacked Interface-Treated Josephson Junctions Fabricated by New in Situ Process Reviewed

T. Kimura, K. Taniike, T. Inoue, M. Inoue, and A. Fujimaki

Physica C   Vol. 445-448   page： 921-924   2006

Recent Progress in Rapid-Single-Flux-Quantum Circuits Invited

A. Fujimaki, T. Yamada, M. Tanaka, H. Akaike, N. Yoshikawa, H. Terai, and S. Yorozu

Advances in Science and Technology   Vol. 47   page： 180-187   2006

The influence of the ground current on large-scale single-flux-quantum ciircuits

K.Fujiwara, T.Hikida, N.Yoshikawa, A.Fujimaki, S.Yorozu and H.Terai

Supercond. Sci. Technol.   Vol. 19 ( 5 ) page： S362-S365   2006

Recent Topics in High-Tc Superconductive Electronics Invited Reviewed

M. Tonouchi, A. Fujimaki, K. Tanabe, K. Enpuku, K. Nikawa, and T. Kobayashi

Jpn. J. Appl. Phys. Pt.1   Vol. 44 ( 11 ) page： 7735-7749   2005

銅酸化物超伝導体におけるジョセフソンデバイス研究の現状 Reviewed

藤巻 朗，斗内 政吉，前田 京剛

固体物理   Vol. 40 ( 10 ) page： 817-827   2005

Study on the Barrier Formation of Vertically-Stacked Interface-Treated Junctions Reviewed

M. Inoue, K. Taniike, T. Kimura, and A. Fujimaki

Physica C   Vol. 426-431   page： 1508-1513   2005

Development of Passive Interconnection Technology for SFQ Circuits Reviewed

Y. Hashimoto, S. Yorozu, Y. Kameda, A. Fujimaki, H. Terai, and N. Yoshikawa

IEICE Trans. Electron.   Vol. E88-C ( 2 ) page： 198-207   2005

High-Speed Demonstration of Single-Flux-Quantum Cross-Bar Switch up to 50 GHz Reviewed

Y. Kameda, S. Yorozu, Y. Hashimoto, H. Terai, A. Fujimaki and, N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 1 ) page： 6-10   2005

Error Rate Test of Large-Scale SFQ Digital Circuit Systems Reviewed

K. Fujiwara, N. Nakajima, T. Nishigai, M. Ito, N. Yoshikawa, A. Fujimaki, H. Terai and, S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 427-430   2005

Single-Flux-Quantum (SFQ) Circuit Design and Test of Crossbar Switch Scheduler Reviewed

Y. Kameda, S. Yorozu, Y. Hashimoto, H. Terai, A. Fujimaki, and N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 423-426   2005

Progress of Single Flux Quantum Packet Switch Technology Invited Reviewed

S. Yorozu, Y. Kameda, Y. Hashimoto, H. Terai, A. Fujimaki, and N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 411-414   2005

Demonstration of a Single-Flux-Quantum Microprocessor Using Passive Transmission Lines Reviewed

M. Tanaka, T. Kondo, N. Nakajima, T. Kawamoto, Y. Yamanashi, Y. Kamiya, A. Akimoto, A. Fujimaki, H. Hayakawa, N. Yoshikawa, H. Terai, Y. Hashimoto, and S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 400-404   2005

Advanced Design Approaches for SFQ Logic Circuits Based on the Binary Decision Diagram Reviewed

T. Nishigai, M. Ito, N. Yoshikawa, K. Obata, K. Takagi, N. Takagi, A. Fujimaki, H. Terai, and S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 380-383   2005

The Relation Between Bit-Error Rate, Operating Speed and Circuit Scale of SFQ Circuits Reviewed

H. Terai, Y. Hashimoto, S. Yorozu, A. Fujimaki, N. Yoshikawa, and Z. Wang

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 364-367   2005

Implementation of a 4 x 4 Switch With Passive Interconnects Reviewed

Y. Hashimoto, S. Yorozu, Y. Kameda, A. Fujimaki, H. Terai, and N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 356-359   2005

Demonstration of the Multi-Bit Sigma-Delta A/D Converter With the Decimation Filter Reviewed

A. Sekiya, K. Okada, Y. Nishido, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 340-343   2005

Quantitative Evaluation of the Single-Flux-Quantum Cross/Bar Switch Reviewed

T. Yamada, M. Yoshida, T. Hanai, A. Fujimaki, H. Hayakawa, Y. Kameda, S. Yorozu, H. Terai, and N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 324-327   2005

20 GHz Operation of Bit-Serial Handshaking Systems Using Asynchronous SFQ Logic Circuits Reviewed

M. Ito, K. Kawasaki, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 255-258   2005

Vertically-Stacked Josephson Junctions Using YbBa2Cu3O7-x as a Counter Electrode for Improving Uniformity Reviewed

T. Kimura, K. Wakita, Y. Yoshinaga, K. Taniike, T. Nishitani, M. Inoue, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 145-148   2005

Analysis of the Barrier in Vertically-Stacked Interface-Treated Josephson Junctions Reviewed

M. Inoue, Y. Yoshinaga, K. Wakita, K. Taniike, T. Kimura, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 2 ) page： 141-144   2005

超伝導単一磁束量子回路によるマルチビットアナログ−ディジタル変換器の提案 Reviewed

関谷 彰人，西土 佳典，藤巻 朗

電子情報通信学会論文誌 C   Vol. J88-C ( 7 ) page： 560-567   2005

Design and Investigation of Gate-to-Gate Passive Interconnections for SFQ Logic Circuits Reviewed

Y. Hashimoto, S. Yorozu, Y. Kameda, A. Fujimaki, H. Terai, and N. Yoshikawa

IEEE Trans. Appl. Supercond.   Vol. 15 ( 3 ) page： 3814-3820   2005

Design and Implementation of Double Oscillator Time-to-Digital Converter Using SFQ Logic Circuits Reviewed

T. Nishigai, M. Ito, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Physica C   Vol. 426-431   page： 1699-1703   2005

Design of a Datapath for Single-Flux-Quantum Microprocessors with Multiple ALUs Reviewed

M. Tanaka, T. Kondo, T. Kawamoto, Y. Kamiya, K. Fujiwara, Y. Yamanashi, A. Akimoto, A. Fujimaki, N. Yoshikawa, H. Terai, and S. Yorozu

Physica C   Vol. 426-431   page： 1693-1698   2005

Consideration of Logic Synthesis and Clock Distribution Networks for SFQ Logic Circuits Reviewed

A. Akimoto, Y. Yamanashi, N. Yoshikawa, A. Fujimaki, S. Yorozu, and H. Terai

Physica C   Vol. 426-431   page： 1687-1692   2005

Parameter Optimization of a Josephson Latching Driver Based on Bit-Error-Rate Simulations Reviewed

H. Kojima, Y. Yamashiro, K. Fujiwara, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Physica C   Vol. 426-431   page： 1680-1686   2005

Superconducting Digital Electronics Invited Reviewed

H. Hayakawa, N. Yoshikawa, S. Yorozu, and A. Fujimaki

Proc. IEEE   Vol. 92 ( 10 ) page： 1549-1563   2004

Design and Implementation of SFQ Programmable Clock Generators Reviewed

M. Ito, N. Nakajima, K. Fujiwara, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Physica C   Vol. 412-414   page： 1550-1554   2004

Design and Implementation of Circuit Components of the SFQ Microprocessor, CORE1 Reviewed

N. Nakajima, F. Matsuzaki, Y. Yamanashi, N. Yoshikawa, M. Tanaka, T. Kondo, A. Fujimaki, H. Terai, and S. Yorozu

Supercond. Sci. Technol.   Vol. 17 ( 3 ) page： 301-307   2004

Timing Jitter Measurement of Single-Flux-Quantum Pulse in Josephson Transmission Line Reviewed

H. Terai, Z. Wang, Y. Hashimoto, S. Yorozu, A. Fujimaki, and N. Yoshikawa

Appl. Phys. Lett.   Vol. 84 ( 12 ) page： 2133-2135   2004

Investigation of the Electrical Properties of Vertically Stacked Interface-Treated Josephson Junctions Reviewed

Y. Yoshinaga, S. Izawa, K. Wakita, T. Ito, M. Inoue, A. Fujimaki, and H. Hayakawa

Supercond. Sci. Technol.   Vol. 17 ( 4 ) page： 653-656   2004

Preparation and Design of a Mechanically Tunable Superconducting Lumped-Element Filter Reviewed

S. Hontsu, S. Mine, H. Nishikawa, M. Nakamori, A. Fujimaki, and T. Kawai

Supercond. Sci. Technol.   Vol. 17 ( 5 ) page： 255-258   2004

High-Speed Test of SFQ-Shift Register Files Using PTL Wiring Reviewed

K. Fujiwara, Y. Yamashiro, N. Yoshikawa, Y. Hashimoto, S. Yorozu, H. Terai, and A. Fujimaki

Physica C   Vol. 412-414   page： 1586-1590   2004

A Behavioral-Level HDL Description of SFQ Logic Circuits for Quantitative Performance Analysis of Large-Scale SFQ Digital System Reviewed

F. Matsuzaki, N. Yoshikawa, M. Tanaka, A. Fujimaki, and Y. Takai

Physica C   Vol. 392-396   page： 1495-1500   2003

High-Speed Operation of a Single-Flux-Quantum (SFQ) Cross/Bar Switch up to 35 GHz Reviewed

Y. Kameda, S. Yorozu, H. Terai, and A. Fujimaki

Jpn. J. Appl. Phys. Pt.1   Vol. 42 ( 4B ) page： 2163-2166   2003

Investigation of Properties of Stacked-Type Interface-Treated Josephson Junctions Fabricated With PrGaO3 Doping Process Reviewed

Y. Yoshinaga, S. Izawa, K. Wakita, T. Kito, M. Inoue, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 805-808   2003

Study of Mechanically Tunable Superconducting Microwave Filter Using Lumped Elements Reviewed

S. Hontsu, S. Mine, H. Nishikawa, M. Nakamori, A. Fujimaki, M. Inoue, A. Maehara, and T. Kawai

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 720-723   2003

Simulation Study on the Mechanical Tuning of High-Tc Superconducting Microwave Filters Reviewed

M. Inoue, A. Maehara, H. Mizuno, A. Fujimaki, S. Hontsu, S. Mine, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 704-707   2003

Demonstration of Decimation Filter and High-Speed Testing of a Component of the Filter Reviewed

A. Sekiya, M. Tanaka, A. Akahori, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 579-582   2003

Design and Demonstration of SFQ Pipelined Multiplier Reviewed

A. Akahori, M. Tanaka, A. Sekiya, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 559-562   2003

The Effects of Dc Bias Current in Large-Scale SFQ Circuits Reviewed

H. Terai, Y. Kameda, S. Yorozu, A. Fujimaki, and Z. Wang

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 502-506   2003

Numerical Analysis of Superconductive Oversampling Analog-to-Digital Converters Reviewed

A. Fujimaki, K. Nakazono, M. Onogi, K. Okada, A. Sekiya, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 13 ( 2 ) page： 492-495   2003

単一磁束量子を情報担体とする超高速論理回路 Invited Reviewed

藤巻 朗，萬 伸一，田原 修一，早川 尚夫

電子情報通信学会論文誌 C   Vol. J86-C ( 6 ) page： 573-581   2003

Design of the Speedup Buffer for the Single-Flux-Quantum Network Switch Reviewed

T. Hanai, T. Matsumoto, S. Yorozu, Y. Kameda, H. Terai, N. Yoshikawa, A. Fujimaki, and H. Hayakawa

Supercond. Sci. Technol.   Vol. 16 ( 12 ) page： 1452-1455   2003

Design and High-Speed Test of (4 × 8)-Bit Single-Flux-Quantum Shift Register Files Reviewed

K. Fujiwara, Y. Yamashiro, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Supercond. Sci. Technol.   Vol. 16 ( 12 ) page： 1456-1459   2003

Prototypic Design of the Single-Flux-Quantum Microprocessor, CORE1 Reviewed

M. Tanaka, F. Matsuzaki, T. Kondo, N. Nakajima, Y. Yamanashi, H. Terai, S. Yorozu, N. Yoshikawa, A. Fujimaki, and H. Hayakawa

Supercond. Sci. Technol.   Vol. 16 ( 12 ) page： 1460-1463   2003

Component Test toward Single-Flux-Quantum Processors Reviewed

M. Tanaka, T. Kondo, A. Sekiya, A. Fujimaki, H. Hayakawa, F. Matsuzaki, N. Yoshikawa, H. Terai, and S. Yorozu

Physica C   Vol. 392-396   page： 1490-1494   2003

Single Flux Quantum Circuit Technology Innovation for Backbone Router Applications Reviewed

S. Yorozu, Y. Kameda, Y. Hashimoto, H. Terai, A. Fujimaki, and N. Yoshikawa

Physica C   Vol. 392-396   page： 1478-1484   2003

Measurement of Crosstalk Between Crossing Superconductor Microstrip Lines Reviewed

Y. Hashimoto, S. Yorozu, H. Terai, and A. Fujimaki

Physica C   Vol. 392-396   page： 1472-1477   2003

Design and Implementation of a High-Speed Bit-Serial SFQ Adder Based on the Binary Decision Diagram Reviewed

K. Kawasaki, K. Yoda, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu

Supercond. Sci. Technol.   Vol. 16 ( 12 ) page： 1497-1502   2003

A New Design Approach Based on a Multi-Wiring-Layer Process for High-Density SFQ Circuits Reviewed

H. Terai, S. Yorozu, A. Fujimaki, N. Yoshikawa, and Z. Wang

Supercond. Sci. Technol.   Vol. 16 ( 12 ) page： 1464-1467   2003

High-End Server Based on Complexity-Reduced Architecture for Superconductor Technology

A. Fujimaki, Y. Takai and N. Yoshimura

IEICE Trans. Electron   Vol. E85-C ( 3 ) page： 612-616   2002

High-temperature superconductor vertically-stacked Josephson junctions

Y. Yoshinaga, T. Kito, S. Izawa, M. Maruyama, M. Inoue, A. Fujimaki and H. Hayakawa

Supercond. Sci. Technol.   Vol. 15 ( 12 ) page： 1646-1650   2002

セルベース設計法に基づいたSFQ回路の高速動作実証

赤堀　旭、田中雅光、関谷彰人、藤巻　朗、早川尚夫

電子情報通信学会論文誌C   Vol. J85-C ( 11 ) page： 1028-1034   2002

A single flux quantum standard logic cell library

S. Yorozu, Y. Kameda, H. Terai, A. Fujimaki, T. Yamada and S. Tahara

Physica C   Vol. 378-381   page： 1471-1474   2002

Demonstration of the SFQ pipelined circuit at 14GHz

A. Akahori, A. Sekiya, T. Yamada, A. Fujimaki and H. Hayakawa

Physica C   Vol. 378-381   page： 1461-1465   2002

Excess-current-free stacked Josephson junctions with high InRn product

T. Kito, Y. Yoshinaga, S. Izawa, M. Inoue, A. Fujimaki,and H. Hayakawa

Physica C   Vol. 378-381   page： 1322-1326   2002

Large Tunability of the Resonant Frequency of Superconducting Coplanar Waveguide Resonator by Mechanically Tunable Method

S. Mine, S. Hontsu, H. Nishikawa, M. Terakago, A. Fujimaki, M. Inoue and A. Maehara

Sing. J. Phys.   Vol. 18 ( 1 ) page： 133-137   2002

Characteristics of mechanically tunable superconductive resonators

S. Mine, M. Terakago, T. Sakatani, S. Hontsu, H. Nishikawa, A. Fujimaki, M. Nakamori, H. Tabata and T. Kawai

Supercond. Sci. Technol.   Vol. 15 ( 4 ) page： 635-638   2002

Design and Demonstration of Pipelined Circuits Using SFQ Logic

A. Akahori, A. Sekiya, T. Yamada, A. Fujimaki and H. Hayakawa

IEICE Trans. Electron   Vol. E-85-C ( 3 ) page： 641-644   2002

Study on Fabrication Conditions of the Interface-Treated Trilayer Junctions

M. Maruyama, K. Yoshida, T. Kito, T. Furutani, Y. Yoshinaga, M. Horibe, M. Inoue, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 11 ( 1 ) page： 7878-790   2001

Demonstration of 17 GHz Operation of M-code Generator Based on SFQ with Resettable Latch

A. Akahori, N. Takeuchi, N. Mori, Y. Suzuki, F. Furuta, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 11 ( 1 ) page： 521-524   2001

Broad Band Software-Defined Radio Receivers Based on Superconductive Devices

A. Fujimaki, K. Nakazono, H. Hasegawa, T. Sato, A. Akahori, N. Takeuchi, F. Furuta, M. Katayama and H. Hayakawa

IEEE Tran. Appl. Supercond.   Vol. 11 ( 1 ) page： 318-321   2001

Preparation of Ramp-edge Interface Modified Junctions for HTS SFQ Circuits

M. Horibe, T. Ito, Y. Inagaki, G. Matsuda, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 11 ( 1 ) page： 159-162   2001

Overdamped NbN Junctions with Nb/ALO_x/Nb Multilayered Barriers

H. Akaike, T. Iwai, Y. Ninomiya, K. Nakamura, A. Fujimaki and H. Hayakawa

IEEE Trans.Appl.Supercond.   Vol. 11 ( 1 ) page： 72-75   2001

Bit Error Rate Measurement of a Measuring System Designed for Superconducting Digital Circuits

K. Shimaoka, S. Tokunaga, M. Nemoto, I. Yoshida, A. Fujimaki and H. Hayakawa

IEICE Trans. Electron   Vol. E-84-C ( 1 ) page： 29-34   2001

NbN/Nb/AlO_x/Nb/NbN junctions fabricated using an ultra-high vacuum dc-magnetron sputtering system

K. Nakamura, H. Akaike, Y. Ninomiya, Y. Tate, A. Fujimaki and H. Hayakawa

Supercond.Sci.Technol.   Vol. 14 ( 12 ) page： 1144-1147   2001

On-chip test of the shift register for high-end network switch based on cell-based design

T. Yamada, A. Sekiya, A. Akahori, H. Akaike, A. Fujimaki, H. Hayakawa, Y.Kameda, S.Yorozu and H.Terai

Supercond. Sci.Technol.   Vol. 14 ( 12 ) page： 1071-1077   2001

The Improvement of the characteristics of ramp-edge junctions with interface modified barriers

T. Ito, M. Horibe, Y. Inakgaki, A. Fujimaki and H. Hayakawa

Supercond.Sci.Technol.   Vol. 14 ( 12 ) page： 1052-1055   2001

Improvement of interface-treated junctions using vicinal SrTiO₃ substrates

Y. Yoshinaga, T. Kito, S. Izawa, M. Horibe, M. Maruyama, M. Inoue, A. Fujimaki and H. Hayakawa

Supercond. Sci. Technol.   Vol. 14 ( 12 ) page： 1001-1004   2001

Mechanically Tunable High-Temperature Superconducting Microwave Filter with Large Shift of Resonant Frequency

S. Hontsu, T. Sakatani, A. Fujimaki, H. Nishikawa, M. Nakamori and T. Kawai

Jpn. J. Appl. Phys. Pt.2   Vol. 40 ( 11A ) page： L1148-L1150   2001

Preparation of Superconducting Magnetostatic Wave(MSW) Devices Consisting of High-Tc Superconducor(HTS)/Perovskite-Type Manganite Heterostructures: Application of Pr_0.85Ca_0.15MnO₃

S. Hontsu, T. Sakatani, H. Nishikawa, M. Nakamori, A. Fujimaki and T. Kawai

Jpn. J. Appl. Phys. Pt.2   Vol. 40 ( 10B ) page： L1100-L1102   2001

Planarization of the YBa₂Cu₃O_7-x Base Electrodes in Trilayer Josephson Junctions

M. Maruyama, T. Furutani, Y. Yoshinaga, T. Kito, G. Matsuda, H. Akaike, M. Inoue, A. Fujimaki and H. Hayakawa

Jpn.J.Appl.Phys.Pt.2   Vol. 40 ( 9A/B ) page： L932-L934   2001

A new optimization procedure for single flux quantum circuits

N. Mori, A. Akahori, T. Sato, N. Takeuchi, A. Fujimaki and H. Hayakawa

Physica C   Vol. 357-360   page： 1557-1560   2001

Pipelined architecture based on single flux quantum with resettable latch

A. Akahori, N. Takeuchi, T. Sato, N. Mori, A. Fujimaki and H. Hayakawa

Physica C   Vol. 357-360   page： 1544-1547   2001

Effects of etching conditions on interface-treated trilayer junctions

M. Maruyama, T. Kito, T. Furutani, Y. Yoshinaga, M. Horibe, M. Inoue, A. Fujimaki and H. Hayakawa

Physica C   Vol. 357-360   page： 1436-1439   2001

Reproducibility and controllability of critical current for ramp-edge interface-modified junctions

M. Horibe, T. Ito, Y. Inagaki, K. Ohnishi, G. Matsuda, Y. Yoshinaga, M. Maruyama, A. Fujimaki and H. Hayakawa

Physica C   Vol. 357-360   page： 1424-1427   2001

Design and Demonstration of Fundamental Logic Circuits Based on a Single-Flux-Quantum Gate with a Resettable Latch

N. Takeuchi, A. Akahori, N. Mori, Y. Suzuki, F. Furuta, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 11 ( 1 ) page： 966-969   2001

Interface-Treated Josephson Junctions in Trylayer Structures

M. Maruyama, K. Yoshida, T. Furutani, Y. Inagaki, M. Horibe, M. Inoue, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 39 ( 3A/B ) page： L205-L207   2000

ソフトウェア無線基地局への超伝導技術応用

藤巻　朗、　片山　正昭

電子情報通信学会論文誌C   Vol. J83-C ( 7 ) page： 589-595   2000

Experimental Demonstration of Single Flux Quantum Logic with Resettable Latch

F. Furuta, A, Akahori, N. Mori, T. Sato, N. Takeuchi, H. Hasegawa, Y. Suzuki, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 10 ( 2 ) page： 1612-1616   2000

Characteristics of Interface-Modified Josephson Junctions Fabricated under Various Etching Conditions

M. Horibe, Y. Inagaki, K. Yoshida, G. Matsuda, N. Hayashi, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 39 ( 4A ) page： L284-L287   2000

Surface resistance of Bi-2212 films and influence of intergrowth

J. Otsuka, O. Yamamoto, Y. Sugihara, T. Senzaki, K. Ohbayashi, M. Inoue, A. Fujimaki and H. Hayakawa

Physica C   Vol. 331 ( 2 ) page： 164-170   2000

New Logic Circuits Basedon SFQ Signals

F. Furuta, Y. Suzuki, E. Oya, S. Matsumoto, H. Akaike, A. Fujimaki, H. Hayakawa and Y. Takai

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3553-3556   1999

Improvement of the SAndwich Junction Properties by Planarization of YBCO films

M. Maruyama, K. Yoshida, M. Horibe, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3456-3459   1999

Surface Resistance of Bi-2212 Films Fabricated by multitarget Sputtering

J. Otsuka, K. Ohbayashi, Y. Sugihara, T. Senzaki, M. Yoshida, M. Inoue, A. Fujimaki and H.Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 2183-2186   1999

Overdamped Niobium-nitrideJunctions for 10K Operation

H. Akaike, R. Oke, T. Aoyama, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3263-3266   1999

Systematic Investigation of Ramp Edge Junction Using Ca-doped PBCO Barrier

M. Horibe, N. Hayashi, K. Kawai, M. Maruyama, A. Fujimaki andH. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3378-3381   1999

Preparation og Ramp-Edge Josephson Junctions with Natural Barriers

A. Fujimaki, K. Kawai, N. Hayashi, M. Horibe, M. Maruyama and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3436-3439   1999

Properties of c-axis Josephson tunneling between Bi₂Sr₂CaCu₂O₈ and Nb

I. Kawayama, M. Kanai, T. Kawai, M. Matsuyama, A. Fujimaki and H. Hayakawa

Physica C   Vol. 325 ( 1-2 ) page： 49-55   1999

Application of a Cryogenic Vector Network Measuring Technique in High-speed Digital Test

K. Shimaoka, M. Nemoto, S. Tokunaga, I. Yoshida, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 9 ( 2 ) page： 3845-3849   1999

Preapration of Intrinsic Josephson Junctions using Bi-2212 Thin Films

M. Inoue, M. Yoshida, T. Senzaki, Y. Shigehara, J. Otsuka, K. Ohbayashi, A. fujimaki and H. Hayakawa

IEEE Trans Appl. Supercond   Vol. 9 ( 2 ) page： 4503-4506   1999

Overdamped NbN Josephson Junctions Based on Nb/AlO_x/Nb Trilayer Technology

T. Iwai, T. Aoyama,R. Oke, H. Akaike, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phs. Pt.2   Vol. 38 ( 8B ) page： L929-L931   1999

Advanced base-station based on superconductive devices and software-defined radio technology

A. Fujimaki, M. Katayama, H. Hayakawa and A. Ogawa

Supercond. Sci. Technol.   Vol. 12 ( 11 ) page： 708-710   1999

Fabrication of natural-barrier ramp-edge Josephson junctions

M. Horibe, Y. Inagaki, G. Matsuda, N. Hayashi, K. Kawai, M. Maruyama, A. Fujimaki and H. Hayakawa

Supercond. Sci. Technol.   Vol. 12 ( 11 ) page： 726-728   1999

High-speed operation of RSFQ circuits up to 30 GHz

F. Furuta, Y. Suzuki, H. Hasegawa, E. Oya, A. Fujimaki and H. Hayakawa

  Vol. 12 ( 11 ) page： 786-788   1999

Ramp-Edge Josephson Junctions Using Barriers of Various Resistivities

M. Horibe, K. Kawai, A. Fujimaki, and H. Hayakawa

IEICE Trnas. Electron.   Vol. E81-C ( 10 ) page： 1526   1998

Formation of c-Axis Oriented YBa₂Cu₃O_7-y Thin Film on Amorphous Substrates with Al(111) Buffer Layer

S. Hontsu, M. Nakamori, H. Tabata, A. Fujimaki, J. Ishii, and T. Kawai

Jpn. J. Appl. Phys. Part 1   Vol. 37 ( 8 ) page： 4358-4361   1998

A study on the control of the material properties of Bi₂Sr₂CaCu₂O_x thin films for intrinsic Josephson junctions

M. Inoue, M. YOshida, . Tsuge, T. Senzaki, Y. Sugihara, J. Otsuka, K. Ohbayashi, A. Fujimaki and H. Hayakawa

Physica C   Vol. 307 ( 3&4 ) page： 221-228   1998

Characteristics of Nb Junctions with additional Al/AlO_x

H. Sugiyama, K. Kobata, A. Fujimaki and H. Hayakawa

Appl. Supercond.   Vol. 6 ( 10-12 ) page： 483-489   1998

Logic Function Demonstrations of 4JC-SQUID-Based Gates

F. Furuta, E. oya, S. Matsumoto, H. Akaike, A. Fujimaki, and H. Hayakawa

Applied Superconductivity   Vol. 5 ( 7-12 ) page： 327-332   1997

New SQUID Gates and its Implementation into Logic Circuits

F. Furuta, S. Matsumoto, H. Akaike, A. Fujimaki, and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 7 ( 2 ) page： 3311-3314   1997

Electrical Properties of YBCO/Ca-YBCO/YBCO Trilayer Josephson Junctions Using C-axis Oriented Films

J. Wang, M. Maruyama, T. Ota, H. Terai, M. Inoue, . Fujimaki, and H. Hayakawa

IEEE Trans, Appl. Supercond   Vol. 7 ( 2 ) page： 2948-2951   1997

Overdamped NbN Junctions with NbN_x Barriers Formed by Plasma Nitridation

H. Akaike, K. Yoshizawa, R. Ota, A. Fujimaki, and H. Hayakawa

Applied Superconductivity   Vol. 5 ( 7-12 ) page： 319-325   1997

New Vortex Flow Transistors Made of YBa₂Cu₃Oy Thin Films

A. Fujimaki, M. Kusunoki, M. Kito, S. Yoshida, H. Andoh, and H. Hayakawa

IEEE Transactions on Applied Superconductivity   Vol. 7 ( 2 ) page： 2399-2402   1997

Characteristics of Nb/Al/AlO_x/Al/AlO_x/Nb Junctions Based on the Proximity Effect

H. Sugiyama, A. Yamada, M. Ota, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 36 ( 9A/B ) page： L1157-L1160   1997

Vortex Flow Transistors Based on YBa₂Cu₃O₇-δ Films

A. Fujimaki, M. Kusunoki, M. Kito, S. Yoshida, H. Andoh and H. Hayakawa

IEICE Trans. Electron.   Vol. E-79-C ( 9 ) page： 1247-1253   1996

Fabrication of all-NbN Josephsonjunctions using semiconductive amorphous NbN_x barriers

H. Yamamori, K. Yoshizawa, A. Fujimaki and H. Hayakawa

Supercond. Sci. Technol.   Vol. 9 ( 4A ) page： A30-A33   1996

Variations of oder parameter and bias current distrribution with time in thin film superconducting lines

H. Andoh, M. Kito, M. Kusunoki, A. Fujimaki and H. Hayakawa

Supercond. Sci. Technol.   Vol. 9 ( 4A ) page： A55-A58   1996

Anisotropic Etching Process for Submicron Patterning of Nb Using CF₄

H. Akaike, T. Watanabe, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.1   Vol. 34 ( 3 ) page： 1515-1518   1995

Superconducting Flux Flow Transistors with Submicrometer Structures

M. Kusunoki, H. Akaike, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 3389-3392   1995

Computer Simulations of Dynamics Vortex Lines in Superconducting Flux Flow Transistors

H. Andoh, M. Kusunoki, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 3377-3380   1995

Synchronous Switching in Vertically Stacked Josephson Junctions

H. Yamamori, A. Fujimaki, Y. Takai and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 3102-3105   1995

Fabrication of Bi₂Sr₂Ca₂Cu₃O_x Thin Film Grain Boundary Junctions

K. Ohbayashi, H. Fujii, A. Kuzuhara, T. Ohtsuki, M. Inoue, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2816-2819   1995

Characteristics of High Critical Current Density Josephson Junctions with Nb/AlO_x/Nb Trilayers

H. Sugiyama, A Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2739-2742   1995

Electrical interface structure in YBa₂Cu₃O_7-x/metal contact

H. Terai, A. Fujimaki, Y. Takai and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2408-2411   1995

Fabrication of Submicron Nb/AlO_x-Al/Nb Tunnel Junctions Using Focused Ion Beam Implanted Nb Pattering(FINP) Technique

H. Akaike, T. Watanabe, N. Nagai, A. FUjimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2310-2313   1995

Ba_1-xK_xBiO₃Grain Boundary Junctions Prepared on SrTiO₃ Bicrystal Substrates

S. Imaeda, M. Inoue, A. Fujimaki and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2208-2211   1995

Transport Properties of YBCO/PBCO/YBCO Junctions

Y. Sawada, H. Terai, A. Fujimaki, Y. Takai and H. Hayakawa

IEEE Trans. Appl. Supercond.   Vol. 5 ( 2 ) page： 2099-2102   1995

Systematic Measurement of Critical Current Density for Narrow YBa₂Cu₃O_y Lines

M. Kusunoki, H. Andoh, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 34 ( 5B ) page： L612-614   1995

Numerical Analysis on Influence of Surface Barrier on Current-Voltage Characteristics for Narrow Superconducting Lines

H. Andoh, M. Kusunoki, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 34 ( 4A ) page： L408-L411   1995

Study on the transition width at gap voltage caused by the proximity effect in Nb-based Josephson junctions

H. Yamamori, T. Miura, A. Fujimaki, Y. Takai and H. Hayakawa

Supercond. Sci. Technol.   Vol. 7 ( 5 ) page： 284-286   1994

Simultaneous Switching on Vertically Stacked Josephson Junction with Very Thin Intermediate Electrode

H. Yamamori, A. Fujimaki, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 33 ( 6B ) page： L846-L849   1994

Submicron Patterning Technique for YBa₂Cu₃O_y Films Using Focused Ion Beam Lithography

M. Kusunoki, H. Akaike, A. Fujimaki and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 33 ( 8A ) page： L1124-L1127   1994

Planar type Ba_1-xK_xBiO₃ Josephson tunnel junctions prepared on SrTiO₃ bicrystal substrates

M. Inoue, S. Imaeda, Y. Tsukino, A. Fujimaki, Y. Takai and H. Hayakawa

Appl. Phys. Lett.   Vol. 65 ( 2 ) page： 243-245   1994

High-Quality Nb/AlO_x-Al/Nb Josephson Junctions with Gap Voltage of 2.95m V

M. Kusunoki, H. Yamamori, A. Fujimaki, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phs.Pt.2   Vol. 32 ( 11A ) page： L1609-L1611   1993

Electrical properties of YBa₂Cu₃O_7-x/PrBa₂Cu₃O_7-x bi-layers

H. Terai, S. Sanada, A. Fujimaki, Y. Takai, and H. Hayakawa

IEEE Trans Appl. Supercond.   Vol. 3 ( 1 ) page： 1301-1304   1993

Fabrication of Nb/AlO_x/Nb tunnel junctions using focused ion beam implanted NB Patterning(FINP) technique

H. Akaike, A. Fujimaki, Y. Takai and H. Hayakawa

IEEE Trans Appl. Supercond.   Vol. 3 ( 1 ) page： 2187-2190   1993

α軸配向YBa₂Cu₃O_7-x薄膜を用いた積層型デバイス

藤巻　朗、　寺井弘高、　早川尚夫

電子情報通信学会論文誌　C-Ⅱ   Vol. J76-C-Ⅱ ( 6 ) page： 371-377   1993

Magnetic Field Dependence of High Jc YBa₂Cu₃O_7-x/Au/Nb Junctions Using α-Axis-Oriented YBa₂Cu₃O_7-x Thin Films

H. Terai, A. Fujimaki, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 32 ( 7A ) page： L901-L904   1993

Submicrometer-Scale Patterning of Superconducting Nb Films Using Focused Ion Beam

H. Akaike, A. Fujimaki, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 31 ( 4A ) page： L410-L412   1992

Experimental analysis of superconducting properties of Y-Ba-Cu-O/Ag proximity interfaces

A. Fujimaki, Y. Takai and H. Hayakawa

IEEE Trans. Mag.   Vol. 27 ( 2 ) page： 1353-1356   1991

Comparison of Si and Insb as the Normal layer of S-N-S junctions

T. Hato, H. Akaike, A. FUjimaki, Y. Takai and H. Hayakawa

IEEE Trans. Mag.   Vol. 27 ( 2 ) page： 2585-2588   1991

Expeimental Analysis of YBa₂Cu₃O_x/Ag Proximity Interfaces

A. Fujimaki, T. Tamaoki, T. Hidaka, M. Yanagase, T. Shiota, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phys. Pt.2   Vol. 29 ( 9 ) page： L1659-L1662   1990

Unique Method of Patterning Superconducting Thin Films by Selective Growth of Y-Ba-Cu-O

T. Hatano, A. Fujimaki, Y. Takai and H. Hayakawa

Jpn. J. Appl. Phys. Pt.1   Vol. 29 ( 6 ) page： 1076-1079   1990

先端材料応用事典

藤巻　朗、早川尚夫（ Role： Joint author）

産業調査会事典出版センター  1990 

Demonstration of essential elements for realizing low-power half-flux-quantum circuits International conference

Nakayama Toranosuke, Tanemura Shoma, Higashi Masayuki, Li Feng, Tanaka Masamitsu, Fujimaki Akira

Joint Workshop of 5th Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2023), 16th Superconducting SFQ VLSI Workshop (SSV 2023), and 2nd International Workshop of Spin/Quantum Materials and Devices (IWSQMD 2023)  2023.11.16 

Energy efficient half-flux-quantum circuit aiming at milli-kelvin stage operation International conference

Li Feng, Pham Duong, Takeshita Yuto, Tanemura Shoma, Higashi Masayuki, Yamashita Taro, Tanaka Masamitsu, Fujimaki Akira

18th International Superconductive Electronics Conference (ISEC 2023)  2023.11.11 

Logic and memory circuits based on π-junction-based SQUIDs International conference

Fujimaki Akira, Li Feng, Takeshita Yuto, Tanemura Shoma, Nakayama Toranosuke, Tanaka Masamitsu

18th International Superconductive Electronics Conference (ISEC 2023)  2023.11.11 

π-π-π SQUIDにおける共振ステップの観測

堀 裕貴, 李 峰,中山 彪之助, 東 正志, 田中 雅光, 藤巻 朗

第84回応用物理学会秋季学術講演会  2023.9.21 

Superconducting Full-wave Rectifier Using π-JJ-based Phase Shifter

2023.9.21 

π-SQUIDに基づく磁気結合素子の静的解析

東 正志, 森 日向子, 李 峰, 田中 雅光, 藤巻 朗

第84回応用物理学会秋季学術講演会  2023.9.21 

単一磁束量子回路に基づくリセット機能付きFIFO同期器の設計

樋脇 晃祐, 田中 雅光, 李 峰, 藤巻 朗

2023年電子情報通信学会ソサイエティ大会  2023.9.15 

多量子ビット制御に向けたNbNベース単一磁束量子スイッチ制御付き4出力分岐回路

上田伴春, 宮嶋茂之, 寺井弘高, Pham Duong, 田中 雅光, 山下 太郎, 西村 治道, 藤巻 朗

2023年電子情報通信学会ソサイエティ大会  2023.9.15 

半磁束量子回路のD フリップフロップの動作実証

種村 匠真, 東 正志, 中山 彪之助, 李 峰, 田中 雅光, 藤巻 朗

2023年電子情報通信学会ソサイエティ大会  2023.9.15 

π接合で構成した断熱量子磁束パラメトロンの検討

藤村 海斗, 田中 雅光, 李 峰, 藤巻 朗

2023年電子情報通信学会ソサイエティ大会  2023.9.15 

Evaluation of energy consumption and frequency in impulse-driven memories International conference

Sato Taichi, Fujisawa Hinata, Higashi Masayuki, Takeshita Yuto, Li Feng, Tanaka Masamitsu, Fujimaki Akira

16th European Conference on Applied Superconductivity  2023.9.4 

Demonstration of impulse-driven memories with bias-free storage cells International conference

Fujimaki Akira, Takeshita Yuto, Fujisawa Hinata, Sato Taichi, Higashi Masayuki, Li Feng, Tanaka Masamitsu

16th European Conference on Applied Superconductivity  2023.9.5 

Gate-level-pipeline SFQ circuits for high-throughput floating-point arithmetic International conference

Tanaka Masamitsu, Nagaoka Ikki, Kashima Ryota, Hiwaki Kousuke, Tanimoto Teruo, Ono Takatsugu, Inoue Koji, Yamashita Taro, Fujimaki Akira

16th European Conference on Applied Superconductivity  2023.9.6 

Field free superconducting diode effect with π-JJ-based arbitrary phase shifter International conference

Li Feng, Sato Taichi, Fujisawa Hinata, Higashi Masayuki, Takeshita Yuto, Tanaka Masamitsu, Fujimaki Akira

16th European Conference on Applied Superconductivity  2023.9.6 

Analysis of the AC response of single π-junction-SQUIDs International conference

Higashi Masayuki, Li Feng, Takeshita Yuto, Tanaka Masamitsu, Fujimaki Akira

16th European Conference on Applied Superconductivity  2023.9.4 

動特性を考慮したインパルス駆動型メモリセルの詳細設計

佐藤 太一, 藤澤 日向, 東 正志, 竹下 雄登, 李 峰, 田中 雅光, 藤巻 朗

電子情報通信学会超伝導エレクトロニクス研究会  2023.8.8 

Analysis of the giant inductance effect in single π-junction-SQUIDs International conference

M. Higashi, F. Li, Y. Takeshita, M. Tanaka, A. Fujimaki

11th East Asia Symposium on Superconductor Electronics (EASSE 2023)  2023.3.27 

Impact of π-junction-based SQUIDs on superconductor circuits International conference

A. Fujimaki, Y. Takeshita, M. Higashi, H. Fujisawa, S. Tanemura, F. Li, M. Tanaka

11th East Asia Symposium on Superconductor Electronics (EASSE 2023)  2023.3.28 

Demonstration of a superconductor 8-bit microprocessor based on high-throughput single-flux-quantum logic circuits International conference

M. Tanaka, I. Nagaoka, S. Kawakami, T. Tanimoto,T. Ono, K. Inoue, A. Fujimaki

11th East Asia Symposium on Superconductor Electronics (EASSE 2023)  2023.3.27 

Design of half flux quantum circuits with controllability in energy efficiency International conference

T. Nakayama, Y. Takeshita, S. Tanemura, F. Li, M. Tanaka, A. Fujimaki

11th East Asia Symposium on Superconductor Electronics (EASSE 2023)  2023.3.27 

0-0-π SQUIDの非対称性が半磁束量子回路に及ぼす影響

中山彪之助, 堀裕貴, 竹下雄登, 李峰, 田中 雅光, 藤巻 朗

第70回応用物理学会春季学術講演会  2023.3.16 

π-SQUID に基づくインパルス駆動メモリセルの動作実証

竹下雄登, 藤澤日向, 東正志, 李峰, 田中 雅光, 藤巻 朗

第70回応用物理学会春季学術講演会  2023.3.16 

微小信号領域におけるπ-SQUID の巨大インダクタンスとしての挙動解析

東正志, 竹下雄登, 李峰, 田中 雅光, 藤巻 朗

第70回応用物理学会春季学術講演会  2023.3.16 

半磁束量子回路の安定動作に向けた回路構成法に関する研究

袁磊, 竹下雄登, 東正志, 中山彪之助, 李峰, 田中 雅光, 藤巻 朗

第70回応用物理学会春季学術講演会  2023.3.16 

インパルス駆動型メモリの拡張性に関する検討

佐藤太一, 藤澤日向, 竹下雄登, 李峰, 田中 雅光, 藤巻 朗

第70回応用物理学会春季学術講演会  2023.3.16 

ジョセフソン接合による単一磁束量子回路の希釈冷凍機下おける動作

上田伴春, 中山彪之助, 宮嶋茂之, 寺井弘高, Duong Pham, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2023年総合大会  2023.3.10 

半磁束量子回路のパラメータ設計指針

種村匠真, 中山彪之助, 竹下雄登, Feng Li, 田中 雅光, 藤巻 朗

電子情報通信学会2023年総合大会  2023.3.10 

A Compact Giant Inductance Device Based on the Negative Flowing Current Across the Ferromagnetic Josephson Junction for Superconducting Electronics International conference

F. Li, M. Higashi, Y. Takeshita, M. Tanaka, A. Fujimaki

International Forum on Applied Superconductivity and Magnetism(IFASM Oceania2022)  2022.12.7 

Half Flux Quantum Circuit Based on π-Junctions Invited International conference

A. Fujimaki, F. Li, Y. Takeshita, M. Higashi, M. Tanaka,

The 35th International Symposium on Superconductivity (ISS2022)  2022.12.1 

A 57.2GHz 11.2mW 8-bit General Purpose Superconductor Microprocessor with Dual-Clocking Scheme International conference

I. Nagaoka, R. Kashima, T. Nakano, M. Tanaka, T. Yamashita, K. Inoue, A. Fujimaki

IEEE Asian Solid Circuits Conference(A-SSCC2022)  2022.11.9 

High-Throughput Single-Flux-Quantum Circuits Based on Gate-Level-Pipelining toward Artificial Intelligence Applications International conference

M. Tanaka, I. Nagaoka, S. Kawakami, T. Tanimoto, T. Ono, K. Inoue, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.29 

Analysis of Single-π-junction SQUIDs Acting as a Giant Inductance International conference

M. Higashi, F. Li, Y. Takeshita, M. Tanaka, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.30 

Demonstration of Non-Destructive Readout of Impulse-Driven Memory Cell Based on 0-π SQUIDs International conference

H. Fujisawa, Y. Takeshita, M. Higashi, F. Li, M. Tanaka, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.30 

A Giant Inductance Device Based on the Negative Flowing Current Across the Ferromagnetic Josephson Junction for Superconducting Electronics International conference

F. Li, M. Higashi, Y. Takeshita, M. Tanaka, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.30 

Demonstration of Writing Operation of 0-π-SQUID-Based Memory Cells Using only ImpulseShaped Voltage Pulses International conference

Y. Takeshita, H. Fujisawa, M. Higashi, F. Li, M. Tanaka, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.30 

Recent Progress in the Development of NbN/PdNi/NbN π Junctions for Quantum Circuits International conference

D. Pham, K. Oba, Y. Takeshita, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th Superconducting SFQ VLSI Workshop (SSV 2022) / 4rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)  2022.9.30 

Un-shunted SFQ Circuits Based on SFIS Ferromagnetic π Junctions

F. Li, Y. Lei, Y. Takeshita, M. Higashi, M. Tanaka, A. Fujimaki

2022.9.22 

NbNベース半磁束量子回路の実現に向けたトグルフリップフロップ回路の作製

大場 絢次郎, Pham Duong, 田中 雅光, 山下 太郎, 藤巻 朗

第83回応用物理学会秋季学術講演会  2022.9.22 

半磁束量子回路の半磁束量子-電圧変換回路のパラメータ最適化

種村 匠真, 竹下 雄登, 李 峰, 田中 雅光, 藤巻 朗

2022年電子情報通信学会ソサイエティ大会  2022.9.7 

量子ビットとのモノリシック実装に向けたNbNベース低電圧駆動単一磁束量子回路の設計

上田 伴春, 中山 彪之助, 田中 雅光, 山下 太郎, 藤巻 朗

2022年電子情報通信学会ソサイエティ大会  2022.9.7 

高い磁気結合を得るためのπ接合を用いたSQUIDの解析

東 正志, 竹下 雄登, 藤澤 日向, 李 峰, 田中 雅光, 藤巻 朗

電子情報通信学会超伝導エレクトロニクス研究会  2022.8.9 

25kA/cm² Nb/Al/AlOx /Al/Nb接合を用いた単一磁束量 子シフトレジスタの170GHz動作

田中 雅光, 山下 太郎, 藤巻 朗, 牧瀬 圭正, 永沢 秀一, 日高 睦夫

第69回応用物理学会春季学術講演会  2022.3.23 

NbNベース半磁束量子回路によるトグルフリップフロッ プ回路の設計と作製

杉本 理駆, 大場 絢次郎, Pham Duong, 田中 雅光, 山下 太郎, 藤巻 朗

第69回応用物理学会春季学術講演会  2022.3.23 

π-π-π SQUIDs: The Switching Element of HFQ Circuits Operating at mK

F. Li, D. Pham, Y. Takeshita, K. Kato, M. Tanaka, T. Yamashita, A. Fujimaki

2022.3.23 

インパルス信号によるメモリセルの状態制御の実証

竹下 雄登, 藤澤 日向, 加藤 健人, 東 正志, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第69回応用物理学会春季学術講演会  2022.3.23 

高透磁率を得るためのπ接合を用いたSQUIDの解析

東 正志, 竹下 雄登, 加藤 健人, 藤澤 日向, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第69回応用物理学会春季学術講演会  2022.3.23 

量子ビットとのモノリシック実装に向けたNbNベース超 低消費電力単一磁束量子回路の設計

中山 彪之助, 上田 伴春, 田中 雅光, 山下 太郎, 藤巻 朗

第69回応用物理学会春季学術講演会  2022.3.23 

単一磁束量子回路の面積削減へ向けた細線受動伝送線路用ビアホールの設計と評価

加島 亮太, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2022年総合大会  2022.3.16 

単一磁束量子回路に基づくゲートレベルパイプライン浮動小数点演算器の動作実証

長岡 一起, 加島 亮太, 田中 雅光, 川上 哲志, 谷本 輝夫, 山下 太郎, 井上 弘士, 藤巻 朗

電子情報通信学会2022年総合大会  2022.3.16 

半磁束量子回路の回路パラメータ最適化

種村 匠真, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2022年総合大会  2022.3.16 

Pi-phase shift in NbN-based Josephson junctions with weak ferromagnet Pd89Ni11 interlayer

D. Pham, R. Sugimoto, K. Oba, Y. Takeshita, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

2021.11.15 

Pursuit of High-Speed Operation and Low Energy Consumption in Superconductor Logic Circuits International conference

A. Fujimaki, F. Li, M. Tanaka, T. Yamashita,

The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems  2021.11.9 

Controlling Flexibility of Information Carrier Using Magnetic Josephson Junctions toward Highly Energy-Efficient Processing International conference

M. Tanaka, M. Higashi, T. Yamashita, A. Fujimaki

The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems  2021.11.10 

Low-power Half-flux-quantum Circuits and the Fabrication Process Based on Ferromagnetic SFIS Josephson Junctions International conference

F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, A. Fujimaki

The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems  2021.11.9 

Study on Pulse-Driven, Low Energy Consumption Memory Based on 0-π SQUIDs International conference

Y. Takeshita, F. Li, H. Fujisawa, K. Kato, M. Higashi, M. Tanaka, T. Yamashita, A. Fujimaki

The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems  2021.11.9 

単一磁束量子回路によるビット幅可変加算器の設計と評価

石川 伊織, 長岡 一起, 石田 浩貴, 福光 孝介, 岡 慶太郎, 田中 雅光, 川上 哲志, 谷本 輝夫, 藤巻 朗, 井上 弘士

第238回 システム・アーキテクチャ研究発表会（HotSPA 2021）  2021.10.11 

単一磁束量子回路に基づくゲートレベルパイプライン浮動小数点演算器の設計

長岡 一起, 加島 亮太, 田中 雅光, 山下 太郎, 川上 哲志, 井上 弘士, 藤巻 朗

2021年電子情報通信学会ソサイエティ大会  2021.9.16 

低レイテンシ化を目的としたインターリーブ方式レジスタを伴う単一磁束量子データパスの動作実証

加島 亮太, 長岡 一起, 中埜 智貴, 田中 雅光, 山下 太郎, 藤巻 朗

2021年電子情報通信学会ソサイエティ大会  2021.9.16 

アンシャント接合による加算器の高速化

国吉 真波, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

2021年電子情報通信学会ソサイエティ大会  2021.9.16 

磁性ジョセフソン接合を用いたインパルス駆動型超伝導 メモリセルの動作実証

藤澤 日向, 竹下 雄登, 加藤 健人, 東 正志, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

量子ビット応用に向けた絶縁層を含む強磁性ジョセフソ ン接合の開発

大場 絢次郎, Pham Duong, 杉本 理駆, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

高透磁率を得るためのπ接合を用いた人工スピン系の提案

東 正志, 竹下 雄登, 加藤 健人, 藤澤 日向, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

半磁束量子を利用した小面積Tフリップフロップの解析

中村 祐介, 東 正志, 竹下 雄登, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

10kA/cm2 プロセスを用いた単一磁束量子100GHzビット 並列加算器の実証

中埜 智貴, 長岡 一起, 加島 亮太, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

Half-Flux-Quantum Toggle Flip Flops Based on π-π-π SQUIDs

F. Li, Y. Takeshita, M. Higashi, M. Tanaka, T. Yamashita, A. Fujimaki

2021.9.12 

インパルス信号による超伝導マトリクスメモリの内部状 態の読み出し

加藤 健人, 竹下 雄登, 藤澤 日向, 東 正志, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

インパルス駆動型マルチビットメモリの作製と実証

竹下 雄登, 藤澤 日向, 加藤 健人, 東 正志, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第82回応用物理学会秋季学術講演会  2021.9.12 

Demonstration of π‐phase shift in NbN‐based Josephson junctions with PdNi ferromagnetic interlayers International conference

D. Pham, R. Sugimoto, K. Oba, Y. Takeshita, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th European Conference on Applied Superconductivity(EUCAS2021)  2021.9.6 

Study on magnetic properties of pi‐junction‐based artificial spin systems International conference

M. Higashi, Y. Takeshita, K. Kato, H. Fujisawa, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th European Conference on Applied Superconductivity(EUCAS2021)  2021.9.9 

Implementation of a high‐throughput bit‐parallel microprocessor using single‐flux‐quantum logic International conference

I. Nagaoka, R. Kashima, T. Nakano, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th European Conference on Applied Superconductivity(EUCAS2021)  2021.9.6 

Demonstration of impulse‐driven, high‐speed memories based on 0‐pi SQUIDs International conference

Y. Takeshita, H. Fujisawa, K. Kato, M. Higashi, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th European Conference on Applied Superconductivity(EUCAS2021)  2021.9.9 

Demonstration of half‐flux‐quantum T‐flip flop made up with only π junctions International conference

F. Li, Y. Takeshita, K. Kato, M. Higashi, M. Tanaka, T. Yamashita, A. Fujimaki

The 15th European Conference on Applied Superconductivity(EUCAS2021)  2021.9.9 

磁場変調周期が半磁束量子となるSQUIDの評価

竹下 雄登, 東 正志, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会超伝導エレクトロニクス研究会（SCE）  2021.8.6 

フィードバックパスを伴う単一磁束量子回路の高スループット・低レイテンシ化

加島 亮太, 一起 長岡, 中埜 智貴, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会超伝導エレクトロニクス研究会（SCE）  2021.8.6 

パルス駆動型超伝導マトリクスメモリにおけるセル選択に関する研究

加藤 健人, 竹下 雄登, 東 正志, 長谷川 大輝, 藤澤 日向, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

パルス駆動型メモリの実現に向けた低電流で駆動可能なメモリセルの設計と評価

藤澤 日向, 竹下 雄登, 加藤 健人, 東 正志, 長谷川 大輝, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

SFQアニーラに向けた単一のスピン素子の特性評価

東 正志, 長谷川 大輝, 竹下 雄登, 加藤 健人, 藤澤 日向, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

半磁束量子-単一磁束量子変換回路の実証

中村 祐介, 長谷川 大輝, 竹下 雄登, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

磁性ジョセフソン接合を含むSQUIDによる半磁束量子単位変調

竹下 雄登, 加藤 健人, 長谷川 大輝, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

NbN/PdNi/NbN 接合におけるジョセフソン臨界電流の強磁性膜厚依存性

杉本 理駆, Pham Duong, 中村 颯, 田中 雅光, 山下 太郎, 藤巻 朗

第68回応用物理学会春季学術講演会  2021.3.18 

NbN-based Josephson junction with PdNi-ferromagnetic barrier* International conference

2021.3.18 

単一磁束量子回路の高集積化へ向けた細線受動伝送線路の評価

加島 亮太, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2021年総合大会  2021.3.9 

単一磁束量子回路に基づく 50GHzビット並列演算マイクロプロセッサの設計

長岡 一起, 加島 亮太, 中埜 智貴, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2021年総合大会  2021.3.9 

アンシャント接合によるSFQ論理ゲートのエネルギー効率の向上

国吉 真波, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

電子情報通信学会2021年総合大会  2021.3.9 

超伝導コンピュータの過去、現在、将来

藤巻 朗

電子情報通信学会2021年総合大会  2021.3.10 

超電導ディジタル集積回路の基礎と開発状況 Invited

藤巻朗

低温工学・超電導学会 2020年度第2回超電導応用研究会シンポジウム  2021.3.1  低温工学・超電導学会

低消費電力単一磁束量子回路の動作周波数の調査

国吉 真波, 村瀬 健, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

超伝導エレクトロニクス研究会（SCE）  2021.1.19 

Study on pulse-driven,high-speed memory based on O-π SQUIDs with passive transmission lines International conference

Y. Takeshita, D. Hasegawa, F. Li, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.10.28 

Study on the nanocryotron switching behavior by the numerical calculation International conference

M. Inoue, I. Miyazaki, K. Izaki, K. Sano, T. Yamashita, M. Tanaka, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.3 

Demonstration of a 52-GHz, energy-efficient, bit-parallel multiplier using low-voltage rapid single-flux-quantum logic International conference

I. Nagaoka, K. Ishida, M. Tanaka, K. Sano, T. Yamashita, T. Ono, K. Inoue, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.2 

Proposal of SFQ annealer using π-junction-based SQUIDs operating at 4 k International conference

M. Higashi, D. Hasegawa, Y. Takeshita, F. Li, M. Tanaka, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.10.30 

Analysis on half flux quantum circuits formed with π and conventional Josephson junctions International conference

D. Hasegawa, Y. Takeshita, F. Li, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.4 

High-density routing with wire length matching for single-flux-quantum circuits using thin passive transmission lines International conference

K. Kitamura, M. Tanaka, T. Kawaguchi, I. Nagaoka, K. Takagi, A. Fujimaki, N. Takagi

Applied Superconductivity Conference ASC2020  2020.11.4 

Demonstration of flux-bias-free flux qubit with a ferromagnetic π junction International conference

T. Yamashita, K. Zuo, Y. Urada, W. Fei, H. Terai, A. Fujimaki, Y. Nakamura

Applied Superconductivity Conference ASC2020  2020.11.5 

50-GHz datapath for parallel SFQ microprocessors based on gate-level-pipeline architecture International conference

R. Kashima, I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.5 

Demonstration of π-junction-based SQUIDs with half-flux-quantum modulation periods for energy-efficient circuits International conference

F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.4 

Investigation of timing parameters in single flux quantum circuits using low critical current junctions and low bias voltages International conference

M. Kuniyoshi, K. Murase, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

Applied Superconductivity Conference ASC2020  2020.11.4 

単一磁束量子回路に基づく並列処理データパスの 64GHz動作実証

加島 亮太, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

2020年電子情報通信学会ソサイエティ大会  2020.9.17 

フィードバックループを含む単一磁束量子回路の高周波設計に向けたカウンターフロー方式シフトレジスタのタイミング解析

長岡 一起, 加島 亮太, 田中 雅光, 山下 太郎, 藤巻 朗

2020年電子情報通信学会ソサイエティ大会  2020.9.17 

低消費電力単一磁束量子回路における論理ゲートのタイミングパラメータ解析

国吉 真波, 長岡 一起, 田中 雅光, 山下 太郎, 藤巻 朗

2020年電子情報通信学会ソサイエティ大会  2020.9.17 

広帯域配線を備えた超伝導デジタル回路用冷凍機システムの特性評価

村瀬 健,佐野 京佑,田中 雅光,山下 太郎,藤巻 朗

第81回応用物理学会秋季学術講演会  2020.9.8 

π位相シフタに向けたコバルト障壁層をもつ強磁性ジョセフソン接合の作製と評価

中村 颯, 杉本 理駆, Pham Duong, 田中 雅光, 山下 太郎, 藤巻 朗

第81回応用物理学会秋季学術講演会  2020.9.8 

SFQパルス駆動型超伝導メモリ実現に向けたメモリセルの静特性評価

竹下 雄登, 李 峰, 長谷川 大輝, 加藤 健人, 田中 雅光, 山下 太郎, 藤巻 朗

第81回応用物理学会秋季学術講演会  2020.9.8 

半磁束量子回路の実現に向けた基本素子の作製

長谷川 大輝, 加藤 健人, 東 正志, 竹下 雄登, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第81回応用物理学会秋季学術講演会  2020.9.8 

SFQアニーラにおける隣接するスピン間の相互作用の影響

東 正志, 長谷川 大輝, 竹下 雄登, 李 峰, 田中 雅光, 山下 太郎, 藤巻 朗

第81回応用物理学会秋季学術講演会  2020.9.8 

単一磁束量子回路に基づく50 GHz並列処理データパスの設計

加島 亮太, 長岡 一起, 田中 雅光, 佐野 京佑, 山下 太郎, 藤巻 朗

2020年電子情報通信学会総合大会 

単一磁束量子回路に基づく低電圧駆動ゲートレベルパイプライン算術論理演算器の設計と評価

長岡 一起, 田中 雅光, 佐野 京佑, 山下 太郎, 井上 弘士, 藤巻 朗

2020年電子情報通信学会総合大会 

低電圧駆動単一磁束量子回路における論理ゲートのタイミングパラメータの解析

国吉 真波, 村瀬 健, 長岡 一起, 佐野 京佑, 田中 雅光, 山下 太郎, 藤巻 朗

2020年電子情報通信学会総合大会 

位相シフタとしてπ接合rf-SQUIDを用いた量子化磁束パラメトロン

赤池 宏之, 藤巻 朗

第67回応用物理学会春季学術講演会 

接合付加による半磁束量子回路の低消費エネルギー化

藤巻 朗, Li Feng, 竹下 雄登, 長谷川 大輝, 佐野 京佑, 田中 雅光, 山下 太郎

第67回応用物理学会春季学術講演会 

4.2Kで動作するSFQアニーラに向けたπ接合を用いたSQUIDの解析

東 正志, 長谷川 大輝, 竹下 雄登, Li Feng, 田中 雅光, 山下 太郎, 藤巻 朗

第67回応用物理学会春季学術講演会 

半磁束量子回路の実証に向けた動作解析

長谷川 大輝, 竹下 雄登, 李 峰, 佐野 京佑, 田中 雅光, 山下 太郎, 藤巻 朗

第67回応用物理学会春季学術講演会 

コバルト障壁層をもつ強磁性ジョセフソン接合の作製と評価

中村 颯, 加藤 悠輝, 田中 雅光, 山下 太郎, 藤巻 朗

第67回応用物理学会春季学術講演会 

超伝導受動線路を用いたパルス駆動型超伝導メモリの開発

竹下 雄登, 長谷川 大輝, 李 峰, 佐野 京佑, 田中 雅光, 山下 太郎, 藤巻 朗

第67回応用物理学会春季学術講演会 

強磁性π接合を用いた磁束バイアスフリーな磁束型量子ビット

山下 太郎, Zuo Kum, 浦出 芳郎, Qiu Wei, 寺井 弘高, 藤巻 朗, 中村 泰信

第67回応用物理学会春季学術講演会 

Phase-shift flux qubit with a ferromagnetic π junction International conference

T. Yamashita, K. Zuo, Y. Urabe, W. Qui, H. Terai, A. Fujimaki, Y. Nakamura

American Physical Society March Meeting 2020 

Challenges to thermal limit, quantum limit, and high throughput based on SFQ circuits

A.Fujimaki, M.Tanaka, N. Yoshikawa

2020 International Symposium on Superconductor Electronics / 13th Superconducting SFQ VLSI Workshop 

High-throughput gate-level-pipelined SFQ multipliers

I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, K. Inoue, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Investigation of timing design by using low-power SFQ shift registers

M. Kuniyoshi, K. Murase, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Fabrication of magnetic Josephson junctions on Nb 4 layer structure for large scale half flux quantum circuits

D. Hasegawa, Y. Takeshita, F. Li, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Demonstration of SQUIDs with a period of half flux quantum in modulation patterns for half flux quantum circuits

Y. Takeshita, F. Li, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Development of gate-level-pipelined SFQ circuits toward ultra-high-speed cryogenic computing

M. Tanaka, I. Nagaoka, K. Ishida, K. Sano, T. Yamashita, T. ono, K. Inoue, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Simulation and comparison of the energy efficiency of half flux quantum circuits

F. Li, Y. Takeshita,K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Design of datapath for 8 bit parallel SFQ microprocessors with gate level pipelines

R. Kashima, I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, A. Fujimaki

13th Superconducting SFQ VLSI Workshop 

Development of 50-GHz, high-throughput rapid single-flux-quantum circuits toward ultra-fast, energy-efficient computing International conference

M. Tanaka, I. Nagaoka, K. Sano, T. Yamashita, K. Ishida, T. Ono, K. Inoue, A. Fujimaki

10th Asian Conference on Applied Superconductivity and Cryogenics, 2nd International Cryogenic Materials Conference in Asia, and CSSJ Joint Conference 

Energy consumption of half flux quantum circuits using π-shifted josephson junctions International conference

F. Li, Y. Takeshita, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

32nd International Symposium on Superconductivity 

π-shifted SQUID based circuits and applications for classical computing and beyond

M. Tanaka, Y. Takeshita, D.Hasegawa, F. Li, K. Sano, T. Yamashita, A. Fujimaki

1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems 

Demonstration of nTrons triggered by SFQ signals in monolithic ICs of Josephson junctions and nTrons

K. Sano, N. Kondo, M. Tanaka, T. Yamashita, M. Inoue, A. Fujimaki

1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems 

Design and demonstration of superconducting single flux quantum circuits operating around 50 GHz International conference

A.Fujimaki

22nd Workshop on Synthesis And System Integration of Mixed Information Technologies 

超伝導量子ビットに向けたNbN/AlN/CuNi/NbN強磁性ジョセフソン接合の作製

加藤 悠輝, 中村 颯, 田中 雅光, 山下 太郎, 藤巻 朗

超伝導エレクトロニクス研究会 

Numerical and experimental analysis on π-shifted SQUIDs for logic circuits and memories International conference

A. Fujimaki, Y. Takeshita, D. Hasegawa, F. Li, K. Sano, M. Tanaka, T. Yamashita

10th East Asia Symposium on Superconductor Electronics (EASSE 2019) 

Nb４層超伝導集積回路上での磁性ジョセフソン接合の作製

長谷川 大輝, 竹下 雄登, 佐野 京佑, 田中 雅光, 山下 太郎, 藤巻 朗

第80回応用物理学会秋季学術講演会 

磁場変調パターンが半磁束量子周期となるSQUIDの作製

竹下 雄登, 長谷川 大輝, 神谷 智大, 佐野 京佑, 田中 雅光, 山下 太郎, 藤巻 朗

第80回応用物理学会秋季学術講演会 

単一磁束量子回路と超伝導ナノデバイスの集積化プロセスの検討

近藤 真生, 佐野 京佑, 田中 雅光, 山下 太郎, 井上 真澄, 藤巻 朗

第80回応用物理学会秋季学術講演会 

単一磁束量子回路に基づく低電圧駆動ゲートレベルパイプライン算術論理演算器の設計と評価

長岡 一起, 田中 雅光, 佐野 京佑, 山下 太郎, 井上 弘士, 藤巻 朗

電子情報通信学会2019年ソサイエティ大会 

Superconducting flux qubit with NbN-based ferromagnetic π junction International conference

T. Yamashita, K. Zuo, Y. Urade, W. Qiu, H. Terai, A. Fujimaki, Y. Nakamura

Superconducting Quantum Devices 2019 (SQD19) 

Monolithic ICs of Josephson junctions and nTrons for large-capacity memories International conference

K. Sano, N. Kondo, M. Tanaka, T. Yamashita, M. Inoue, A. Fujimaki

14th European Conference on Applied Superconductivity (EUCAS 2019) 

Proposal of SQUIDs with a period of half flux quantum in modulation patterns International conference

Y. Takeshita, D. Hasegawa, T. Kamiya, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki

14th European Conference on Applied Superconductivity (EUCAS 2019) 

ランダムアクセスメモリにおける超伝導ナノ構造ラインドライバの検討

佐野 京佑, 近藤 真生, 田中 雅光, 山下 太郎, 井上 真澄, 藤巻 朗

超伝導エレクトロニクス研究会