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Researchers
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YAMANASHI Yuki
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【Published Thesis】 Design and Implementation of a Pipelined Bit-Serial SFQ Microprocessor, CORE1beta 2007.06
【Published Thesis】 Superconductive Random Number Generator Using Thermal Noises in SFQ Circuits 2009.06
【Published Thesis】 Design methodology of single-flux-quantum flip-flops composed of both 0- and π-shifted Josephson junctions 2018.08
【Published Thesis】 Frequency synchronization of single flux quantum oscillators 2021.10
【Published Thesis】 Experimental Demonstrations of Native Implementation of Boolean Logic Hamiltonian in a Superconducting Quantum Annealer 2021.08
【Published Thesis】 Compact Superconducting Lookup Table Composed of Two-Dimensional Memory Cell Array Reconfigured by External DC Control Currents 2021.04
【Published Thesis】 Simulation of the Margins in Single Flux Quantum Circuits Containing π-Shifted Josephson Junctions 2019.08
【Awards】 応用物理学会超伝導分科会第10回研究奨励賞 2019.03
Yokohama National University Doctor Course Completed
Yokohama National University Master Course Completed
Yokohama National University Graduated
Doctor of Engineering - Yokohama National University
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversityInterdisciplinary Research Center Specially Appointed Assistant Professor
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Associate Professor
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Associate Professor
UB Berkeley Visitting researcher
Special researcher of the Japan Society for the Promotion of Science
IEEE
低温工学・超電導学会
電気学会
電子情報通信学会
応用物理学会
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
CHINA Fumihiro, TAKEUCHI Naoki, SUZUKI Hideo, YAMANASHI Yuki, TERAI Hirotaka, YOSHIKAWA Nobuyuki
IEICE Trans. Electron. E105-C ( 6 ) 264 - 269 2022.6 [Reviewed]
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers Joint Work
<p>The adiabatic quantum flux parametron (AQFP) is an energy-efficient, high-speed superconducting logic device. To observe the tiny output currents from the AQFP in experiments, high-speed voltage drivers are indispensable. In the present study, we develop a compact voltage driver for AQFP logic based on a Josephson latching driver (JLD), which has been used as a high-speed driver for rapid single-flux-quantum (RSFQ) logic. In the JLD-based voltage driver, the signal currents of AQFP gates are converted into gap-voltage-level signals via an AQFP/RSFQ interface and a four-junction logic gate. Furthermore, this voltage driver includes only 15 Josephson junctions, which is much fewer than in the case for the previously designed driver based on dc superconducting quantum interference devices (60 junctions). In measurement, we successfully operate the JLD-based voltage driver up to 4 GHz. We also evaluate the bit error rate (BER) of the driver and find that the BER is 7.92×10<sup>-10</sup> and 2.67×10<sup>-3</sup> at 1 GHz and 4 GHz, respectively.</p>
Z. Li, Y. Yamanashi, N. Yoshikawa
IEEE Trans. Appl. Supercond. 32 ( 4 ) 130030 2022.6 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Boltzmann Machine Using Superconducting Circuits
K. Miyake, Y. Yamanashi, N. Yoshikawa
IEEE Trans. Appl. Supercond. 32 ( 4 ) 170020 2022.6 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Design of Discrete Hopfield Neural Network Using a Single Flux Quantum Circuit
H. He, Y. Yamanashi, N. Yoshikawa
IEEE Trans. Appl. Supercond. 32 ( 4 ) 130060 2022.6 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Current Status and Issues of Superconductor Peripheral Circuits for Quantum Computers
Tanaka Masamitsu, Yamanashi Yuki
IEEJ Transactions on Fundamentals and Materials 142 ( 5 ) 175 - 182 2022.5 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan Joint Work
低電力超伝導集積回路研究の進展
山梨裕希, 竹内尚輝, 吉川信行
電気学会論文誌A 136 ( 12 ) 734 - 739 2016.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Joint Work
質量分析用単一磁束量子時間測定回路の測定
超電導Web21 2012.10
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Single Work
セキュリティネットワークを支える物理乱数技術[V]-超伝導物理乱数生成器の開発
電子情報通信学会誌 2012.4
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
SFQ物理乱数発生器の開発展望
山梨 裕希
超電導Web21 2009.10
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Single Work
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
吉川信行, 田中雅光, 藤巻朗
電気学会A部門論文誌 128 ( 6 ) 369 - 372 2008.6
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Joint Work
超伝導物理乱数生成器
山梨裕希
Application no：特願2021-131307 Date applied：2021.8.11
Country of applicant：Domestic
単一磁束量子回路及び単一磁束量子回路動作方法
山梨裕希
Application no：2013-179205 Date applied：2013.8.30
Announcement no：2015-50512 Date announced：2015.3.16
Country of applicant：Domestic
測定装置及び測定方法
山梨裕希
Application no：2013-043481 Date applied：2013.3.5
Announcement no：2014-173846 Date announced：2014.9.22
Country of applicant：Domestic
物理乱数発生器
山梨裕希, 杉浦達郎
Application no：2011-82473 Date applied：2011.4.4
Announcement no：2012-220968 Date announced：2012.11
Country of applicant：Domestic
低温工学・超電導学会優良発表賞
2022.6 低温工学・超電導学会 小型化されたデコーダとメモリセルによる拡張可能な超伝導ランダムアクセスメモリ
Individual or group name of awards：山梨裕希
Superconductor Science and Technology highlights of 2018
2019.4 IOP Publishing Design methodology of single-flux-quantum flip-flops composed of both 0- and π-shifted Josephson junctions
Individual or group name of awards：Y. Yamanashi
応用物理学会超伝導分科会第10回研究奨励賞
2019.3 応用物理学会超伝導分科会
Individual or group name of awards：山梨裕希
超伝導エレクトロニクス第146委員会賞
2018.4 日本学術振興会超伝導エレクトロニクス第146委員会
Individual or group name of awards：山梨裕希
電子情報通信学会エレクトロニクスソサイエティ活動功労表彰
2018.3 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：山梨裕希
確率的演算の導入による超高電力効率を持つ超伝導回路の研究
2022.4 - 2025.3
Grant-in-Aid for Scientific Research(B)
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
2019.4 - 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
超伝導素子と超伝導回路を融合した受信分光システム
2019.4 - 2022.3
科学研究費補助金 Grant-in-Aid for Scientific Research(B)
Investigator(s)：鎌崎剛
Grant type：Competitive
パイ遷移ジョセフソン接合を含む新しい超伝導集積回路の設計法の開発とその応用
2018.4 - 2021.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：山梨 裕希
Grant type：Competitive
熱力学的極限に挑む断熱モード磁束量子プロセッサの研究
2014.4 - 2019.3
科学研究費補助金 Grant-in-Aid for Scientific Research(S)
Investigator(s)：吉川信行
Grant type：Competitive
組合せ最適化処理に向けた革新的 アニーリングマシンの研究開発
2019.4 - 2021.3
超伝導量子アニーリング計算機の研究開発
2018.9 - 2021.3
Private Foundations
磁力を利用した疑似低重力環境下における土壌-機械系摩擦試験法の開発
2012.9 - 2013.8
日揮・実吉奨学会研究助成金
外部電流による再構成が可能な単一磁束量子FPGAの設計
久保田悠聖, 山梨裕希, 吉川信行
電子情報通信学会総合大会
Event date： 2022.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：オンライン
量子アニーリングにおける単位格子間接続用量子ビットの動作検討
才田大輔, 日高睦夫, 牧瀬圭正, 平山文紀, 山梨裕希
応用物理学会春季学術講演会
Event date： 2022.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：青山学院大学
超伝導単一磁束量子回路によるクロックレス論理ゲートを用いた低面積4bit桁上げ先取り加算器の設計
藤澤大世, 山梨裕希, 吉川信行
応用物理学会春季学術講演会
Event date： 2022.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：青山学院大学
超伝導乱数生成器を用いた小面積・低遅延ストカスティック数生成器の設計
牛山雄登, 山梨裕希, 吉川信行
応用物理学会春季学術講演会
Event date： 2022.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：青山学院大学
Design of a High-Throughput Accumulator using Single Flux Quantum Circuit
Event date： 2022.3
Language：Japanese Presentation type：Oral presentation (general)
超伝導量子アニーリング機械の開発
超伝導量子アニーリング計算機の研究開発
Cooperative Research within Japan
Project Year： 2018.9 - 2021.3
2022 Logic Circuits
College of Engineering Science
2022 Elemental Laboratory II for Electrical and Computer System
College of Engineering Science
2022 Elemental Laboratory I for Electrical and Computer System
College of Engineering Science
2022 Electronic Circuits Ⅰ
College of Engineering Science
2022 Electronic Circuits
College of Engineering Science
電気学会量子コンピュータ周辺回路としての低温デジタル回路活用に関する調査専門委員会
2019.10 幹事
Committee type：Academic society
低温工学・超電導学会核融合原型炉の超伝導TFコイル導体の開発課題の技術調査委員会
2019.8 - 2020.2 委員
Committee type：Academic society
12th Superconducting SFQ VLSI Workshop (SSV 2019)
2019.1 Organization committee
Committee type：Academic society
日本学術振興会第146委員会
2018.4 幹事
Committee type：Academic society
11th Superconducting SFQ VLSI Workshop (SSV 2018)
2018.2 Organization committee
Committee type：Academic society
第3回超伝導科学技術セミナー
Role(s)： Lecturer
未踏科学技術協会超伝導科学技術研究会 2019.3
Audience： University students, Graduate students, Teachers, Researchers, Company
Type：Seminar, workshop
超伝導量子コンピュータ
横浜国立大学サイエンスカフェ
Role(s)： Official expert
横浜国立大学 2018.12
Audience： Junior high school students, High school students, University students, Graduate students, General public
Type：Science cafe
超伝導量子コンピュータ～超伝導と量子の力で最適化問題を解く～
電子情報通信学会超伝導エレクトロニクス研究会若手セミナー
Role(s)： Lecturer
名古屋大学 2017.8
Audience： University students, Graduate students, Teachers, Researchers
Type：Seminar, workshop
電子情報通信学会SCE若手セミナー
横浜 2015.8
横浜国立大学サイエンスカフェ
Role(s)： Lecturer
横浜国立大学 2012.7
Audience： Junior high school students, High school students, University students, Graduate students, General public
Type：Lecture
超伝導素子による極限センシング技術
