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YOSHIKAWA Nobuyuki
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【Published Thesis】 Superconducting digital electronics 2004.09
【Published Thesis】 An adiabatic quantum flux parametron as an ultra-low-power logic device 2013.01
【Presentation(International conference)】 2016 Appl. Superconductivity Conference (ASC 2016), Plenary Lecture 2016.09
【Published Thesis】 Scalable flux controllers using adiabatic superconductor logic for quantum processors(Phys. Rev. Research) 2023.02
【Published Thesis】 MANA: A Monolithic Adiabatic iNtegration Architecture Microprocessor Using 1.4-zJ/op Unshunted Superconductor Josephson Junction Devices(IEEE Journal of Solid-State Circuits) 2021.04
【Published Thesis】 Compact RSFQ microwave pulse generator based on an integrated RF module for controlling superconducting qubits(Applied Physics Letters) 2022.02
【Published Thesis】 Demonstration of a 47.8 GHz High-Speed FFT Processor Using Single-Flux-Quantum Technology 2021.08
【Published Thesis】 Adiabatic quantum-flux-parametron with delay-line clocking: logic gate demonstration and phase skipping operation(Superconductor Science and Technology) 2021.12
Yokohama National University Completed
Yokohama National University Graduated
Doctor of Engineering - Yokohama National University
Duty Yokohama National UniversityInstitute of Advanced Sciences Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversitySchool of Engineering Associate Professor
Duty Yokohama National UniversitySchool of Engineering Lecturer
日本学術振興会第146超電導エレクトロニクス委員会
低温・超電導学会
Institute of Electrical Engineering of Japan
応用物理学会
電子情報通信学会
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
Study on single-flux-quantum logic circuits
JST Basic Research Programs (Core Research for Evolutional Science and Technology :CREST)
Project Year：
Study on ultra low-power integrated circuits using adiabatic mode circuits
Grant-in-Aid for Scientific Research
Project Year：
Study on low-temperature CMOS integrated circuits
International Collaboration
Project Year：
Study on Josephson qubits
JST Basic Research Programs (Core Research for Evolutional Science and Technology :CREST)
Project Year：
Single electronics
Grant-in-Aid for Scientific Research
Project Year：
Fundamentals and Frontiers of the Josephson Effect
Editor: Francesco Tafuri（ Role： Sole author , 16.6 Adiabatic flux Quantum Parametron Logic）
Springer
Total pages：859 Responsible for pages：12 Language：English Book type：Scholarly book
微小超伝導接合における新しい量子効果とその応用
吉川 信行
1989.3
Doctoral Thesis Single Work
横浜国立大学
超伝導微小トンネル接合において生じる巨視的量子効果の研究を行った。これらの系においてジョセフソン効果と双対な巨視的量子効果が存在することを理論的に予測し、微粒子超伝導体薄膜を用いた実験によりこれらの効果の存在を実証した。
Study on Single Flux Quantum Floating-Point Divider Based on Goldschmidt's Algorithm
Akiyoshi Sanada, Yuki Yamanashi, Nobuyuki Yoshikawa
IEEE Transactions on Applied Superconductivity Vol.29 ( 5 ) 1301904 - 1301904 2019.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE Joint Work
Design of Adiabatic Quantum-Flux-Parametron Register Files Using a Top-Down Design Flow
Olivia Chen, Ro Saito, Tomoyuki Tanaka, Christopher L. Ayala, Naoki Takeuchi, Nobuyuki Yoshikawa
IEEE Transactions on Applied Superconductivity Vol.29 ( 5 ) 1302905 - 1302905 2019.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE Joint Work
ISSN Information:
Print ISSN: 1051-8223
Electronic ISSN: 1558-2515
CD: 2378-7074
Miniaturization of adiabatic quantum-flux-parametron circuits by adopting offset buffers
Yukihiro Okuma, Naoki Takeuchi, Yuki Yamanashi, Nobuyuki Yoshikawa
Superconductor Science and Technology Vol.32 ( 6 ) 065007 - 065007 2019.5 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：IOP Science Joint Work
Superconductor Amoeba-Inspired Problem Solvers for Combinatorial Optimization
Naoki Takeuchi, Masashi Aono, Nobuyuki Yoshikawa
PHYSICAL REVIEW APPLIED Vol.11 ( 4 ) 044069 - 044069 2019.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：APS Physics Joint Work
Adiabatic Quantum-Flux-Parametron: Towards Building Extremely Energy-Efficient Circuits and Systems
Olivia Chen, Ruizhe Cai, Yanzhi Wang, Fei Ke, Taiki Yamae, Ro Saito, Naoki Takeuch, Nobuyuki Yoshik … Show more authors
Olivia Chen, Ruizhe Cai, Yanzhi Wang, Fei Ke, Taiki Yamae, Ro Saito, Naoki Takeuch, Nobuyuki Yoshikawa Hide authors
Scientific Reports Vol.9 10514 - 10514 2019.7 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Nature Limited Joint Work
「量子コンピュータ周辺回路としての低温デジタル回路」研究開発の動向と最前線
吉川信行
電気学会論文誌Ａ（基礎・材料・共通部門誌） 143 ( 1 ) 19 - 20 2023.1 [Reviewed] [Invited]
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
超低電力コンピューティングのための断熱磁束量子パラメトロンのパラメータ設計法
竹内尚輝、山栄大樹、鈴木秀雄、吉川信行
電子情報通信学会論文誌C J105-C ( 11 ) 329 - 338 2022.11 [Reviewed] [Invited]
Authorship：Last author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
Adiabatic Quantum-Flux-Parametron: A Tutorial Review
TAKEUCHI Naoki, YAMAE Taiki, L. AYALA Christopher, SUZUKI Hideo, YOSHIKAWA Nobuyuki
IEICE Transactions on Electronics E105.C ( 6 ) 251 - 263 2022.6 [Reviewed] [Invited]
Authorship：Last author Language：English Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：一般社団法人 電子情報通信学会 Joint Work
<p>The adiabatic quantum-flux-parametron (AQFP) is an energy-efficient superconductor logic element based on the quantum flux parametron. AQFP circuits can operate with energy dissipation near the thermodynamic and quantum limits by maximizing the energy efficiency of adiabatic switching. We have established the design methodology for AQFP logic and developed various energy-efficient systems using AQFP logic, such as a low-power microprocessor, reversible computer, single-photon image sensor, and stochastic electronics. We have thus demonstrated the feasibility of the wide application of AQFP logic in future information and communications technology. In this paper, we present a tutorial review on AQFP logic to provide insights into AQFP circuit technology as an introduction to this research field. We describe the historical background, operating principle, design methodology, and recent progress of AQFP logic.</p>
Research Trends on Low-power, High-performance Superconducting Computer Technology
Yoshikawa Nobuyuki
IEEJ Transactions on Fundamentals and Materials 142 ( 1 ) 19 - 20 2022.1 [Reviewed] [Invited]
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Institute of Electrical Engineers of Japan Single Work
Yoshikawa Nobuyuki
IEEJ Transactions on Fundamentals and Materials 141 ( 1 ) 20 - 21 2021
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Institute of Electrical Engineers of Japan Single Work
<p>Recently the number of integrated superconductor qubits and the fidelity in the qubit control are rapidly advanced. Besides the quantum supremacy, which is a remarkable milestone for realizing a large-scale quantum computer, was verified. However, for further increase in the scale of the quantum computer, control circuits to manipulate and read out the qubit state at low temperatures are indispensable to reduce the number of wires connecting the qubits at low temperatures with electronics at room temperature. In this report, recent research activities on qubit control circuits operating at low temperatures are reviewed.</p><p>Recently the number of integrated superconductor qubits and the fidelity in the qubit control are rapidly advanced. Besides the quantum supremacy, which is a remarkable milestone for realizing a large-scale quantum computer, was verified. However, for further increase in the scale of the quantum computer, control circuits to manipulate and read out the qubit state at low temperatures are indispensable to reduce the number of wires connecting the qubits at low temperatures with electronics at room temperature. In this report, recent research activities on qubit control circuits operating at low temperatures are reviewed.</p>
2024.1 IEEE (Institute of Electrical and Electronics Engineers)
Individual or group name of awards：Nobuyuki Yoshikawa
Award for Continuing and Significant Contributions in the Field of Applied Superconductivity
2023.9 IEEE Council on Superconductivity
Individual or group name of awards：Nobuyuki Yoshikawa
第27回エレクトロニクスソサイエティ賞
2024.9 電子情報通信学会エレクトロニクスソサイエティ
Individual or group name of awards：吉川信行
超低消費エネルギー高集積断熱量子磁束ロジックの創生
Grant number：24H00311 2024.4 - 2027.3
Grant-in-Aid for Scientific Research(A)
Authorship：Principal investigator Grant type：Competitive
可逆量子磁束回路を用いた熱力学的限界を超える超低エネルギー集積回路技術の創成
2019.6 - 2024.3
科学研究費補助金 Grant-in-Aid for Scientific Research(S)
Investigator(s)：吉川信行
Grant type：Competitive
可逆量子磁束回路を用いた熱力学的限界を超える超低エネルギー論理回路の創成
2019.4 - 2023.3
科学研究費補助金 Grant-in-Aid for Scientific Research(A)
Investigator(s)：吉川 信行
Grant type：Competitive
Study on Adiabatic Single-Flux-Quantum Circuits Operating in the Thermodynamic Energy Limit
2014.4 - 2019.3
Grant-in-Aid for Scientific Research Grant-in-Aid for Scientific Research(S)
Investigator(s)：Nobuyuki Yoshikawa
Grant type：Competitive
Study on sub-μW microprocessors using adiabatic-mode single-flux-quantum circuits
2010.6 - 2015.3
Grant-in-Aid for Scientific Research Grant-in-Aid for Scientific Research(S)
Investigator(s)：Nobuyuki Yoshikawa
Grant type：Competitive
A Hardware Accelerator for Homomorphic Computing Utilizing Superconductor Electronics
2023.4 - 2024.10
Foreign Countries DARPA seedling grant
Authorship：Principal investigator
量子制御電子集積回路の研究開発
2022.4 - 2026.3
Japan Science and Technology Agency
Investigator(s)：吉川信行
量子磁束回路を用いた量子ビット用制御・読出し回路の研究開発
2018 - 2025
高効率・高速処理を可能とするAIチップ・次世代コンピューティングの技術開発／次世代コンピューティング技術の開発／量子計算及びイジング計算システムの統合型研究開発
超伝導量子アニーリングマシンのための超伝導制御・読出し回路の研究開発
米国IARPAプロジェクト SuperTools, 超伝導集積回路用CADツールの開発
2017.9 - 2022.10
米国IARPAプロジェクト SuperTools
Investigator(s)：吉川信行
大規模超伝導集積回路設計のためのCADツールの開発
南アフリカとの共同研究(NRF)
2014.7 - 2016.3
Local Government
Investigator(s)：吉川信行
(Invited) Ultra-Energy-Efficient Superconductive Logic for Classical and Quantum Applications
N. Yoshikawa [Invited]
Event date： 2024.9
Language：English Presentation type：Oral presentation (general)
Venue：Poland
Recent Research on AQFP-Based Accelerator Design
Olivia Chen, Naoki Takeuchi, Renyuan Zhang, Yanzhi Wang, Nobuyuki Yoshikawa
The 36th International Symposium on Superconductivity (ISS2023)
Event date： 2023.11
Language：English Presentation type：Oral presentation (invited, special)
Venue：Wellington, New Zealand
超伝導回路のための重心法を用いた高速な最適化ツールの開発
松岡 昇、吉川信行、山梨裕希
2025年電子情報通信学会総合大会
Event date： 2025.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京都市大学世田谷キャンパス
単一磁束量子回路を用いたユナリーコーディング向けの高容量DFFセルの設計
韓 澤宇、吉川信行、山梨裕希
2025年電子情報通信学会総合大会
Event date： 2025.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京都市大学世田谷キャンパス
単一磁束量子回路における低消費電力な非同期二線式論理ゲートの設計
八幡 泰生、吉川信行、山梨裕希
2025年電子情報通信学会総合大会
Event date： 2025.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京都市大学世田谷キャンパス
Research on High-Speed Integrated Circuits using Single Flux Quantum Logic Circuits
Research on Low Power CMOS Integrated Circuits
Research on Josephson/CMOS Hybrid Memories
International Cooperative Research
Project Year： 2001 - 2001
Research on Superconductor/Semiconductor Hybrid Circuits
Cooperative Research within Japan
Project Year： 2000 - 2001
Research on Design Methodologies of Single Flux Quantum Integrated Circuits
Funded Research on Investiment
Project Year： 2000 - 2001
2025 Advanced Electrical and Computer Engineering
College of Engineering Science
2025 VLSI Systems
College of Engineering Science
2025 Electronic Devices
College of Engineering Science
2025 Integrated Electronics
College of Engineering Science
2025 Basics Electronic Circuits
College of Engineering Science
日本学術振興会第１４６委員会
2018.5 委員長
Committee type：Other
Board Members of Applied Superconductivity Conference
2016.10 - 2022.9 Board Members of Applied Superconductivity Conference
Committee type：Academic society
日本学術振興会学術システム研究センター
2016.4 - 2019.3 研究員
Committee type：Academic society
電気学会金属セラミックス技術委員会
2014.5 委員長
Committee type：Academic society
吉川信行、電気学会金属セラミックス技術委員会委員長、http://www.iee.jp/fms/?page_id=43、2014年5月〜
13th Superconducting SFQ VLSI Workshop (SSV 2020)
Role(s)： Guest, Host, Chief editor, Interviewer, Planner, Logistic support, Report author
13th Superconducting SFQ VLSI Workshop Yokohama Port Opening Memorial Hall, Yokohama 2020.1
Audience： University students, Graduate students, Researchers, Scientific organization, Company
Type：Planning and holding meetings,conferences,e.t.c.
The workshop aims at providing an opportunity to discuss key aspects of
superconductor VLSI technologies. Latest results related to device fabrication, circuit design, function testing, and system integration will be exchanged.
2020 International Symposium on Superconductor Electronics
Role(s)： Guest, Host, Chief editor, Interviewer, Planner, Logistic support, Report author, Other
146th Committee on Superconductive Electronics, JSPS Yokohama Port Opening Memorial Hall, Yokohama 2020.1
Audience： University students, Graduate students, Researchers, Scientific organization, Company, Government agency, Media
Type：Planning and holding meetings,conferences,e.t.c.
集積回路に超電導チップ 消費電力1000分の1以下 横浜国大データ拠点に応用
Role(s)： Filming support
日経産業新聞 2019.3
Audience： General public
Type：Newspaper, magazine
吉川信行、竹内尚輝、”集積回路に超電導チップ 消費電力1000分の1以下 横浜国大データ拠点に応用”、日経産業新聞、2019年3月28日
コンピュータの消費電力1000分の1以下に、実現する集積回路の仕組み 横浜国大が実証
Role(s)： Filming support
ニュースイッチ 日刊工業新聞 電子版 2019.2
Audience： General public
Type：Internet
吉川信行、”コンピュータの消費電力1000分の1以下に、実現する集積回路の仕組み 横浜国大が実証”、ニュースイッチ、2019年2月4日
消費電力1/1000以下 コンピュータ 超電導集積回路で実証 横浜国大
Role(s)： Filming support
日刊工業新聞 2019.2
Audience： General public
Type：Newspaper, magazine
吉川信行、”消費電力1/1000以下 コンピュータ 超電導集積回路で実証 横浜国大”、日刊工業新聞、2019年2月4日
