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Research on ultra-low power sub-terahertz superconducting quantum digital systems based on pulse-driven circuits

Research Project

Project/Area Number 18H05211
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionNagoya University

Principal Investigator

Fujimaki Akira  名古屋大学, 工学研究科, 教授 (20183931)

Co-Investigator(Kenkyū-buntansha) 高木 直史  京都大学, 情報学研究科, 教授 (10171422)
牧瀬 圭正  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 特定フェロー (60363321)
山下 太郎  東北大学, 工学研究科, 教授 (60567254)
吉川 信行  横浜国立大学, 大学院工学研究院, 教授 (70202398)
Project Period (FY) 2018-04-23 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥615,420,000 (Direct Cost: ¥473,400,000、Indirect Cost: ¥142,020,000)
Fiscal Year 2022: ¥78,130,000 (Direct Cost: ¥60,100,000、Indirect Cost: ¥18,030,000)
Fiscal Year 2021: ¥89,180,000 (Direct Cost: ¥68,600,000、Indirect Cost: ¥20,580,000)
Fiscal Year 2020: ¥131,560,000 (Direct Cost: ¥101,200,000、Indirect Cost: ¥30,360,000)
Fiscal Year 2019: ¥176,540,000 (Direct Cost: ¥135,800,000、Indirect Cost: ¥40,740,000)
Fiscal Year 2018: ¥140,010,000 (Direct Cost: ¥107,700,000、Indirect Cost: ¥32,310,000)
Keywords単一磁束量子 / 半磁束量子 / 磁性ジョセフソン接合 / マトリクスメモリ / 量子化条件 / π接合 / 単一磁束量子回路 / 半磁束量子回路 / パルス論理 / パルス駆動回路 / 磁束量子回路 / 超伝導回路
Outline of Final Research Achievements

When a single π-Josephson junction (π junction) is introduced into a superconducting loop, a current spontaneously flows in the loop so as to satisfy the quantization condition, leading to new functions that unable to be installed previously. Since the introduction of a π junction affects the behavior of whole superconductor circuits because the circuits can be regarded as a kind of a complicated interference device. We have found a way to understand the whole physical picture and to engineer meaningful effects. We have also paved the way for the realization of 100 GHz microprocessors and matrix memories that utilize pulses propagating at the speed of light, including junction integration, design, and implementation techniques. In addition, as a new quantum effect, we demonstrated an increase in self-inductance and flux transmission with an efficiency not possible with conventional technology.

Academic Significance and Societal Importance of the Research Achievements

メモリを含む論理演算動作には、信号の持つエネルギー、スイッチングに必要なエネルギー、消費エネルギーの3つのエネルギーが関与し、それらと動作速度や誤り率が密接に関係することが分かった。通常は、上記3つのエネルギーはほぼ同じ値となるが、半磁束量子回路では、独立に制御できる。高エネルギー効率の計算機構築に向け、計算速度、計算精度、消費エネルギーの物理的な意味を考えるきっかけを作ったものと考える。また、半磁束量子回路の低電力性は量子計算の制御へ、π接合を利用した磁束伝送回路は量子アニーリングへ展開できる。単一磁束量子回路も含め、量子を利用した将来の計算機への基盤構築に貢献する。

Assessment Rating
Ex-post Assessment Comments (Rating)

A: In light of the aim of introducing the research area into the research categories, expected outcomes of research have been produced.

Assessment Rating
Interim Assessment Comments (Rating)

A: In light of the aim of introducing the research area into the research categories, the expected progress has been made in research.

Report

(11 results)
  • 2024 Ex-post Assessment (Comments) ( PDF )
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Abstract (Interim Assessment) ( PDF )   Annual Research Report   Interim Assessment (Comments) ( PDF )
  • 2019 Annual Research Report
  • 2018 Abstract ( PDF )   Comments on the Screening Results ( PDF )   Annual Research Report
  • Research Products

    (209 results)

All 2024 2023 2022 2021 2020 2019 2018

All Journal Article (39 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 39 results,  Open Access: 5 results) Presentation (164 results) (of which Int'l Joint Research: 97 results,  Invited: 29 results) Patent(Industrial Property Rights) (1 results) Funded Workshop (5 results)

  • [Journal Article] A High-Throughput Multiply-Accumulate Unit With Long Feedback Loop Using Low-Voltage Rapid Single-Flux Quantum Circuits2023

    • Author(s)
      Nagaoka Ikki、Kashima Ryota、Ishida Koki、Tanaka Masamitsu、Yamashita Taro、Ono Takatsugu、Inoue Koji、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 3 Pages: 1-8

    • DOI

      10.1109/tasc.2023.3239329

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct observations of π-leaps of superconducting phase differences in π-junction-based SQUIDs2023

    • Author(s)
      Takeshita Yuto、Li Feng、Higashi Masayuki、Tanaka Masamitsu、Yamashita Taro、Fujimaki Akira
    • Journal Title

      Superconductor Science and Technology

      Volume: 36 Issue: 4 Pages: 045004-045004

    • DOI

      10.1088/1361-6668/acb38d

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconductor digital circuits with π junctions alone2023

    • Author(s)
      Li Feng、Takeshita Yuto、Tanaka Masamitsu、Fujimaki Akira
    • Journal Title

      Applied Physics Letters

      Volume: 122 Issue: 16 Pages: 162601-162601

    • DOI

      10.1063/5.0144604

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 50-GFLOPS Floating-Point Adder and Multiplier Using Gate-Level-Pipelined Single-Flux-Quantum Logic With Frequency-Increased Clock Distribution2023

    • Author(s)
      Nagaoka Ikki、Kashima Ryota、Tanaka Masamitsu、Kawakami Satoshi、Tanimoto Teruo、Yamashita Taro、Inoue Koji、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 4 Pages: 1-11

    • DOI

      10.1109/tasc.2023.3250614

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of the Effect of 0-π SQUIDs for Enhancing Mutual Coupling2023

    • Author(s)
      Higashi Masayuki、Takeshita Yuto、Kato Kento、Fujisawa Hinata、Li Feng、Tanaka Masamitsu、Yamashita Taro、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3249657

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lowering Latency in a High-Speed Gate-Level-Pipelined Single Flux Quantum Datapath Using an Interleaved Register File2023

    • Author(s)
      Kashima Ryota、Nagaoka Ikki、Nakano Tomoki、Tanaka Masamitsu、Yamashita Taro、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-6

    • DOI

      10.1109/tasc.2023.3249131

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimization of Half-Flux-Quantum Circuits Composed of π-Shift and Conventional Josephson Junctions2023

    • Author(s)
      Tanemura Shoma、Takeshita Yuto、Li Feng、Nakayama Toranosuke、Tanaka Masamitsu、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3258374

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Energy efficient half-flux-quantum circuit aiming at milli-kelvin stage operation2023

    • Author(s)
      Li Feng、Pham Duong、Takeshita Yuto、Higashi Masayuki、Yamashita Taro、Tanaka Masamitsu、Fujimaki Akira
    • Journal Title

      Superconductor Science and Technology

      Volume: 36 Issue: 10 Pages: 105006-105006

    • DOI

      10.1088/1361-6668/acf0f2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wire Length-Matching Aware Placement Method for Rapid Single Flux Quantum Logic Circuits2023

    • Author(s)
      Kitamura Kento、Kawaguchi Takahiro、Takagi Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3262216

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Technology Mapping With Clockless Gates for Logic Stage Reduction of RSFQ Logic Circuits2023

    • Author(s)
      Kito Nobutaka、Kawaguchi Takahiro、Takagi Kazuyoshi、Takagi Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3245049

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication Process for Monolithic Integration of a Nitride Superconductor-Based Superconducting Qubit with a Single Flux Quantum Control Circuit2023

    • Author(s)
      Miyajima Shigeyuki、Yamashita Taro、Tanaka Masamitsu、Takeuchi Naoki、Inomata Kunihiro、Terai Hirotaka
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2023.3241270

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design and Component Demonstration of an SFQ Complex Event Detector Corresponding to Regular Expressions2023

    • Author(s)
      Suzuki Takuya、Akizuki Kazuma、Yamanashi Yuki、Yoshikawa Nobuyuki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 33 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2023.3241266

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 32-Bit ALU with Clockless Gates for RSFQ Bit-Parallel Processor2022

    • Author(s)
      Kawaguchi Takahiro、Takagi Naofumi
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E105.C Issue: 6 Pages: 245-250

    • DOI

      10.1587/transele.2021SEP0005

    • NAID

      130008124492

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2022-06-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Current Status and Issues of Superconductor Peripheral Circuits for Quantum Computers2022

    • Author(s)
      田中雅光, 山梨裕希
    • Journal Title

      IEEJ Transactions on Fundamentals and Materials

      Volume: 142 Issue: 5 Pages: 175-182

    • DOI

      10.1541/ieejfms.142.175

    • ISSN
      0385-4205, 1347-5533
    • Year and Date
      2022-05-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Weak spin-flip scattering in Pd89Ni11 interlayer of NbN-based ferromagnetic Josephson junctions2022

    • Author(s)
      Pham Duong、Sugimoto Riku、Oba Kenjiro、Takeshita Yuto、Li Feng、Tanaka Masamitsu、Yamashita Taro、Fujimaki Akira
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1-8

    • DOI

      10.1038/s41598-022-10967-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Static Timing Analysis for Single-Flux-Quantum Circuits Composed of Various Gates2022

    • Author(s)
      Kawaguchi Takahiro、Takagi Kazuyoshi、Takagi Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 5 Pages: 1-9

    • DOI

      10.1109/tasc.2022.3161052

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Logic-Depth-Aware Technology Mapping Method for RSFQ Logic Circuits With Special RSFQ Gates2022

    • Author(s)
      KITO, Nobutaka、TAKAGI, Kazuyoshi、TAKAGI, Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 4 Pages: 1-5

    • DOI

      10.1109/tasc.2021.3129719

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Planarized Nb 4-Layer Fabrication Process for Superconducting Integrated Circuits and Its Fabricated Device Evaluation2021

    • Author(s)
      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
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E104.C Issue: 9 Pages: 435-445

    • DOI

      10.1587/transele.2020SUP0001

    • NAID

      130008082182

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2021-09-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication Process for Superconducting Digital Circuits2021

    • Author(s)
      Mutsuo Hidaka and Shuichi Nagasawa
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E104.C Issue: 9 Pages: 405-410

    • DOI

      10.1587/transele.2020SUI0002

    • NAID

      130008082178

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2021-09-01
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-speed memory driven by SFQ pulses based on 0-π SQUID2021

    • Author(s)
      Yuto Takeshita, Feng Li, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31-5 Issue: 5 Pages: 1100906-1100906

    • DOI

      10.1109/tasc.2021.3060351

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of Interface Circuits Between Half- and Single- Flux- Quantum Circuits2021

    • Author(s)
      Hasegawa Daiki、Takeshita Yuto、Li Feng、Sano Kyosuke、Tanaka Masamitsu、Yamashita Taro、Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2021.3072846

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 64-GHz datapath demonstration for bit-parallel SFQ microprocessors based on a gate-level-pipeline structure2021

    • Author(s)
      Ryota Kashima, Ikki Nagaoka, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31-5 Issue: 5 Pages: 1301006-1301006

    • DOI

      10.1109/tasc.2021.3061353

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of a 52-GHz Bit-Parallel Multiplier Using Low-Voltage Rapid Single-Flux-Quantum Logic2021

    • Author(s)
      I. Nagaoka, K. Ishida, M. Tanaka, K. Sano, T. Yamashita, T. Ono, K. Inoue, and A. Fujimaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: TBD Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2021.3071996

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of Timing Parameters in Single-Flux-Quantum Circuits Using Low Critical-Current Junctions and Low Bias Voltages2021

    • Author(s)
      M. Kuniyoshi, K. Murase, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31 Issue: 5 Pages: 1101405-1101405

    • DOI

      10.1109/tasc.2021.3067827

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synchronous SFQ Address Encoder for Superconductor Detector Arrays2021

    • Author(s)
      Bozbey Ali, Aydogan Eren, Usenmez Kubra, Razmkhah Sasan, Tanaka Masamitsu, Fujimaki Akira
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31 Issue: 4 Pages: 1300106-1300106

    • DOI

      10.1109/tasc.2021.3065000

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Rapid Single-Flux-Quantum Logic Circuits Using Clockless Gates2021

    • Author(s)
      Kawaguchi Takahiro、Takagi Kazuyoshi、Takagi Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 31 Issue: 4 Pages: 1-7

    • DOI

      10.1109/tasc.2021.3068960

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Timing Fault Model and an Efficient Timing Fault Simulation Method for Rapid Single-Flux-Quantum Logic Circuits2021

    • Author(s)
      NAKAMURA, Shogo、TAKAGI, Kazuyoshi、KITO, Nobutaka、TAKAGI, Naofumi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1975 Issue: 1 Pages: 012026-012026

    • DOI

      10.1088/1742-6596/1975/1/012026

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low-power high-speed half-flux-quantum circuits driven by low bias voltages2021

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Journal Title

      Superconductor Science and Technology

      Volume: 34-2 Issue: 2 Pages: 025013-025013

    • DOI

      10.1088/1361-6668/abcaac

    • NAID

      120007145973

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of a 47.8 GHz High-Speed FFT Processor Using Single-Flux-Quantum Technology2021

    • Author(s)
      Fei Ke, Olivia Chen, Yanzhi Wang and Nobuyuki Yoshikawa
    • Journal Title

      IEEE Trans. Appl. Supercond

      Volume: 31-5 Issue: 5 Pages: 1-5

    • DOI

      10.1109/tasc.2021.3059984

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Two-Step Routing Method with Wire Length Budgeting for PTL Routing of SFQ Logic Circuits2020

    • Author(s)
      Kei Kitamura, Kazuyoshi Takagi, and Naofumi Takagi
    • Journal Title

      Journal of Physics

      Volume: 1590 Issue: 1 Pages: 012043-012043

    • DOI

      10.1088/1742-6596/1590/1/012043

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Conversion Method of Netlists Consisting of Conventional Logic Gates to RSFQ Logic Circuits Utilizing Special RSFQ Gates2020

    • Author(s)
      Kito Nobutaka、Takagi Kazuyoshi、Takagi Naofumi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 30 Issue: 7 Pages: 1-6

    • DOI

      10.1109/tasc.2020.3012474

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Layout Design Flow for RSFQ Circuits Based on Cell Clustering and Mixed Wiring of JTLs and PTLs2020

    • Author(s)
      Takashi Dejima, Kazuyoshi Takagi, and Naofumi Takagi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 30-7 Issue: 7 Pages: 1302506-1302506

    • DOI

      10.1109/tasc.2020.3014928

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fundamental study on the nanocryotron properties by the numerical calculation2019

    • Author(s)
      Masumi Inoue, Kazuki Izaki, Yuki Goto, Kyosuke Sano, Taro Yamashita, Masamitsu Tanaka, Akira Fujimaki
    • Journal Title

      EEE Trans. Appl. Supercond.

      Volume: 29 Pages: 1-1

    • DOI

      10.1109/tasc.2019.2904585

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of NbTiN Josephson junctions with thermally oxidized Hf tunnel barriers2019

    • Author(s)
      H. Akaike、K. Munemoto、Y. Sakakibara、A. Fujimaki
    • Journal Title

      IEEE Trans. on Appl. Supercond.

      Volume: 29 Issue: 5 Pages: 1102605-1102605

    • DOI

      10.1109/tasc.2019.2906278

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Demonstration of a Superconducting Nanowire Single-Photon Detector using Adiabatic Quantum-Flux-Parametron Logic in a 0.1-W Gifford-McMahon Cryocooler2019

    • Author(s)
      Takeuchi Naoki、Yamashita Taro、Miyajima Shigeyuki、Miki Shigehito、Yoshikawa Nobuyuki、Terai Hirotaka
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 29 Issue: 5 Pages: 1-4

    • DOI

      10.1109/tasc.2019.2902771

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Boosting the secret key rate in a shared quantum and classical fibre communication system2019

    • Author(s)
      Davide Bacco, *Beatrice Da Lio, Daniele Cozzolino, Francesco Da Ros, Xueshi Guo, Yunhong Ding, Yusuke Sasaki, Kazuhiko Aikawa, Shigehito Miki, Hirotaka Terai, Taro Yamashita 外 6名
    • Journal Title

      Communications Physics

      Volume: 2 Issue: 1

    • DOI

      10.1038/s42005-019-0238-1

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thermally Assisted Superconductor Transistors for Josephson-CMOS Hybrid Memories2018

    • Author(s)
      K. Sano, M. Suzuki, K. Maruyama, S. Taniguchi, M. Tanaka, A Fujimaki, M. Inoue, N. Yoshikawa
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E101.C Issue: 5 Pages: 370-377

    • DOI

      10.1587/transele.E101.C.370

    • NAID

      130006729728

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2018-05-01
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Energy/Space-Efficient Rapid Single-Flux-Quantum Circuits by Using <i>π</i>-Shifted Josephson Junctions2018

    • Author(s)
      T. Kamiya, M. Tanaka, K. Sano, A. Fujimaki
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E101.C Issue: 5 Pages: 385-390

    • DOI

      10.1587/transele.E101.C.385

    • NAID

      130006729704

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2018-05-01
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 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2018

    • Author(s)
      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
    • Journal Title

      電子情報通信学会論文誌C

      Volume: 101-C (10) Pages: 389-399

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Demonstration of increased efficiency in signal transfer circuits caused by a negative inductance of a π-junction2023

    • Author(s)
      Fujimaki Akira, Higashi Masayuki, Hori Hiroki, Mori Hinako, Li Feng, Tanaka Masamitsu
    • Organizer
      36th International Symposium on Superconductivity (ISS 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low-power operation of half-flux-quantum circuits2023

    • Author(s)
      Tanaka Masamitsu, Tanemura Shoma, Nakayama Toranosuke, Higashi Masayuki, Fujimaki Akira
    • Organizer
      36th International Symposium on Superconductivity (ISS 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Logic and memory circuits based on π-junction-based SQUIDs2023

    • Author(s)
      Fujimaki Akira, Li Feng, Takeshita Yuto, Tanemura Shoma, Nakayama Toranosuke, Tanaka Masamitsu
    • Organizer
      18th International Superconductive Electronics Conference (ISEC 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Energy efficient half-flux-quantum circuit aiming at milli-kelvin stage operation2023

    • Author(s)
      Li feng, Pham Duong, Takeshita Yuto, Tanemura Shoma, Higashi Masayuki, Yamashita Taro, Tanaka Masamitsu, Fujimaki Akira
    • Organizer
      18th International Superconductive Electronics Conference (ISEC 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impulse-driven memory cell with a directly coupled word line for reduction in footprint2023

    • Author(s)
      Sato Taichi, Higashi Masayuki, Li Feng, Tanaka Masamitsu, Fujimaki Akira
    • Organizer
      Joint Workshop of 5th QCCC, 16th Superconducting SFQ VLSI Workshop, and 2nd IWSQMD
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of essential elements for realizing low-power half-flux-quantum circuits2023

    • Author(s)
      Nakayama Toranosuke, Tanemura Shoma, Higashi Masayuki, Li Feng, Tanaka Masamitsu, Fujimaki Akira
    • Organizer
      Joint Workshop of 5th QCCC, 16th Superconducting SFQ VLSI Workshop, and 2nd IWSQMD
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SFQ interface circuit for high-speed clock domain crossing2023

    • Author(s)
      Hiwaki Kosuke, Tanaka Masamitsu, Li Feng, Fujimaki Akira
    • Organizer
      Joint Workshop of 5th QCCC, 16th Superconducting SFQ VLSI Workshop, and 2nd IWSQMD
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of a superconductor 8-bit microprocessor based on high-throughput single-flux-quantum logic circuits2023

    • Author(s)
      Tanaka Masamitsu, Nagaoka Ikki, Kawakami Satoshi, Tanimoto Teruo, Inoue Koji, Fujimaki Akira
    • Organizer
      11th East Asia Symposium on Superconductor Electronics (EASSE 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Scalable and flux-bias-free superconducting flux quantum bits2023

    • Author(s)
      Yamashita Taro
    • Organizer
      MRM2023/IUMRS-ICA2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Novel superconducting flux quantum bits toward large-scale quantum circuits2023

    • Author(s)
      Yamashita Taro
    • Organizer
      15th International Workshop on High Temperature Superconductors in High Frequency Fields
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Niobium nitride based ferromagnetic Josephson junctions toward quantum applications2023

    • Author(s)
      Yamashita Taro
    • Organizer
      11th East Asia Symposium on Superconductor Electronics (EASSE 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] One of the Key Issues in Fabrication Process toward Large-scale Superconducting Digital Circuits2023

    • Author(s)
      Hidaka Mutsuo
    • Organizer
      11th East Asia Symposium on Superconductor Electronics (EASSE 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] NbN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における動作2023

    • Author(s)
      上田伴春、中山彪之助、宮嶋茂之、寺井高弘、Pham Duong、田中雅光、山下太郎、藤巻朗
    • Organizer
      2023年電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 半磁束量子回路のパラメータ設計指針2023

    • Author(s)
      種村匠馬、中山彪之助、竹下雄登、李峰、田中雅光、藤巻朗
    • Organizer
      2023年電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 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2023

    • Author(s)
      袁磊、竹下雄登、東正志、中山彪之助、李峰、田中雅光、藤巻朗
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 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2023

    • Author(s)
      東正志、竹下雄登、李峰、田中雅光、藤巻朗
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 0-0-π SQUIDの非対称性が半磁束量子回路に及ぼす影響2023

    • Author(s)
      中山彪之助、堀裕貴、竹下雄登、李峰、田中雅光、藤巻朗
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] π-SQUIDに基づくインパルス駆動メモリセルの動作実証2023

    • Author(s)
      竹下雄登、藤澤日向、東正志、李峰、田中雅光、藤巻朗
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] インパルス駆動型メモリの拡張性に関する検討2023

    • Author(s)
      佐藤太一、藤澤日向、竹下雄登、李峰、田中雅光、藤巻朗
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Superconducting diode using π-JJ-based arbitrary phase shifter2023

    • Author(s)
      Li Feng, Sato Taichi, Fujisawa Hinata, Takeshita Yuto, Tanaka Masamitsu, Fujimaki Akira
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Half flux quantum circuit based on π-junctions2022

    • Author(s)
      Fujimaki Akira, Li Feng, Takeshita Yuto, Higashi Masayuki, Tanaka Masamitsu
    • Organizer
      35th International Symposium on Superconductivity (ISS 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Design methods of an RSFQ circuit composed of clocked gates and clockless gates2022

    • Author(s)
      Takagi Naofumi
    • Organizer
      2022 JSPS 146th Committee International Symposium on Superconductor Electronics, 15th SSV, 4th QCCC
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fabrication Process for Superconductor Digital Circuits in AIST2022

    • Author(s)
      Hidaka Mutsuo
    • Organizer
      2022 JSPS 146th Committee International Symposium on Superconductor Electronics, 15th SSV, 4th QCCC
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 量子コンピュータに向けた超伝導ディジタル周辺回路2022

    • Author(s)
      田中雅光
    • Organizer
      2022年電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 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2022

    • Author(s)
      種村匠馬、竹下雄登、李峰、田中雅光、藤巻朗
    • Organizer
      2022年電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 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2022

    • Author(s)
      上田伴春、中山彪之助、田中雅光、山下太郎、藤巻朗
    • Organizer
      2022年電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 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2022

    • Author(s)
      大場絢次郎、Pham Duong、田中雅光、山下太郎、藤巻朗
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] SFIS磁性π接合に基づくアンシャントSFQ回路の特性評価2022

    • Author(s)
      李峰、袁磊、竹下雄登、東正志、田中雅光、藤巻朗
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] π-π-π SQUIDs: The Switching Element of HFQ Circuits Operating at mK2022

    • Author(s)
      Feng Li, Pham Duong, Yuto Takeshita, Kento Kato, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Half-flux-quantum circuits using π-shifted ferromagnetic junctions2021

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      34th International Symposium on Superconductivity (ISS2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Implementation of a High-Throughput Bit-Parallel Microprocessor Using Single-Flux-Quantum Logic2021

    • Author(s)
      Ikki Nagaoka, Ryota Kashima, Tomoki Nakano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Demonstration of half-flux-quantum T-flip flops made up with only π junctions2021

    • Author(s)
      Feng Li, Yuto Takeshita, Kento Kato, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of π-phase shift in NbN-based Josephson junctions with Pd89 Ni11 ferromagnetic interlayers2021

    • Author(s)
      Pham Duong, Riku Sugimoto, Kenjiro Oba, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of impulse-driven, high-speed memories based on 0-π SQUIDs2021

    • Author(s)
      Yuto Takeshita, Hinata Fujisawa, Kento Kato, Masayuki Higashi, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on magnetic properties of π-junction-based artificial spin systems2021

    • Author(s)
      Masayuki Higashi, Yuto Takeshita, Hinata Fujisawa, Kento Kato, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pursuit of high-speed operation and low energy consumption in superconductor logic circuits2021

    • Author(s)
      Akira Fujimaki, Feng Li, Masamitsu Tanaka, Taro Yamashita
    • Organizer
      The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on pulse-driven, low energy consumption memory based on 0-π SQUIDs2021

    • Author(s)
      Yuto Takeshita, Hinata Fujisawa, Kento Kato, Masayuki Higashi, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      The 14th Superconducting SFQ VLSI Workshop (SSV 2021) / 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 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2021

    • Author(s)
      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
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] SFQアニーラに向けた単一のスピン素子の特性評価2021

    • Author(s)
      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
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 半磁束量子-単一磁束量子変換回路の実証2021

    • Author(s)
      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
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2021

    • Author(s)
      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
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2021

    • Author(s)
      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
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2021

    • Author(s)
      長岡一起,加島亮太, 中埜智貴, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      2021年電子情報通信学会総合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2021

    • Author(s)
      加島亮太, 長岡一起, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      2021年電子情報通信学会総合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 低消費電力単一磁束量子回路の動作周波数の調査2021

    • Author(s)
      国吉真波, 村瀬健, 長岡一起, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      超伝導エレクトロニクス研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Logic Functions Realized Using Clockless Gates for Rapid Single-Flux-Quantum Circuits2021

    • Author(s)
      Takahiro Kawaguchi, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      The 23rd Workshop on Synthesis And System Integration of Mixed Information Technologies
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SFQ回路を用いた超伝導コンピュータの開発2021

    • Author(s)
      高木直史
    • Organizer
      2021年電子情報通信学会総合大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 単一磁束量子回路における微細受動伝送線路の特性評価2021

    • Author(s)
      池戸駿介、山梨裕希、吉川信行
    • Organizer
      2021年電子情報通信学会総合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Phase-shift flux quantum bit with NbN/CuNi/NbN π-junction2020

    • Author(s)
      Yamashita Taro, Zuo Kim, Urade Yoshiro, Qiu Wei, Terai Hirotaka, and Fujimaki Akira
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Extremely energy-efficient processing using superconductor circuits near physical limits2020

    • Author(s)
      Masamitsu Tanaka, Manami Kuniyoshi, Ken Murase, Ikki Nagaoka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Demonstration of flux-bias-free flux qubit with a ferromagnetic π junction2020

    • Author(s)
      Taro Yamashita, Kum Zuo, Yoshiro Urada, Wei Qiu, Hirotaka Terai, Akira Fujimaki, and Yasunobu Nakamura
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 0-GHz datapath for parallel SFQ microprocessors based on gate-level-pipeline architecture2020

    • Author(s)
      Ryota Kashima, Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of π-junction-based SQUIDs with half-flux-quantum modulation periods for energy-efficient circuits2020

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of timing parameters in single flux quantum circuits using low critical current junctions and low bias voltages2020

    • Author(s)
      Manami Kuniyoshi, Ken Murase, Ikki Nagaoka, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-density routing with wire length matching for single-flux-quantum circuits using thin passive transmission lines2020

    • Author(s)
      Kei Kitamura Masamitsu Tanaka, Takahiro Kawaguchi, Ikki Nagaoka, Kazuyoshi Takagi, Akira Fujimaki, and Naofumi Takagi
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis on half flux quantum circuits formed with π and conventional Josephson junctions2020

    • Author(s)
      Daiki Hasegawa, Yuto Takeshita, Feng Li, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of a 52-GHz, energy-efficient, bit-parallel multiplier using low-voltage rapid single-flux-quantum logic2020

    • Author(s)
      Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Takatsugi Ono, Koji Inoue, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal of SFQ annealer using π-junction-based SQUIDs operating at 4 K, Masayuki Higashi2020

    • Author(s)
      Daiki Hasegawa, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on pulse-driven, high-speed memory based on 0-π SQUIDs with passive transmission lines2020

    • Author(s)
      Yuto Takeshita, Feng Li, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      国吉真波, 長岡一起, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      2020年電子情報通信学会ソサイエティ大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      加島亮太, 長岡一起, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      2020年電子情報通信学会ソサイエティ大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Static Timing Analysis of an RSFQ Circuit Considering Timing Jitter2020

    • Author(s)
      Takahiro Kawaguchi, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      The 33rd International Symposium on Superconductivity
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Efficient Timing Fault Simulation of Rapid Single-Flux-Quantum Logic Circuits Considering the Pipelined Behavior2020

    • Author(s)
      Shogo Nakamura, Kazuyoshi Takagi, Nobutaka Kito, and Naofumi Takagi
    • Organizer
      The 33rd International Symposium on Superconductivity
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation and measurement of narrow passive transmission lines for single flux quantum circuits2020

    • Author(s)
      Shunsuke Ikedo, Yuki Yamanashi, and Nobuyuki Yoshikawa
    • Organizer
      The 33rd International Symposium on Superconductivity (ISS2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単一磁束量子回路における受動伝送線路微細化の検討2020

    • Author(s)
      池戸 駿介、山梨 裕希、吉川 信行
    • Organizer
      2020年度春季低温工学・超電導学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高臨界電流密度ジョセフソン集積回路プロセスにおける受動伝送線路特性の調査2020

    • Author(s)
      池戸駿介、山梨裕希、吉川信行
    • Organizer
      2020年電子情報通信学会ソサイエティ大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 単一磁束量子回路における受動伝送線路微細化の検討と評価2020

    • Author(s)
      池戸駿介、山梨裕希、吉川信行
    • Organizer
      電気学会金属・セラミックス超電導機器合同研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 窒化物超伝導量子ビット2020

    • Author(s)
      寺井弘高, 金鮮美, 布施智子, 丘偉, 山下太郎, 吉原文樹, 仙場浩一
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 強磁性ジョセフソン接合の作製技術と量子デバイス応用2020

    • Author(s)
      山下太郎
    • Organizer
      電子情報通信学会2020年総合大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 超伝導集積回路プロセス2020

    • Author(s)
      日高睦夫, 永沢秀一 ,牧瀬圭正
    • Organizer
      電子情報通信学会2020年総合大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Development of 50-GHz, high-throughput rapid single-flux-quantum circuits toward ultra-fast, energy-efficient computing2020

    • Author(s)
      Masamitsu Tanaka, Ikki Nagaoka, Kyosuke Sano, Taro Yamashita, Koki Ishida, Takatsugu Ono, Koji Inoue, Akira Fujimaki
    • Organizer
      10th Asian Conference on Applied Superconductivity and Cryogenics (ACASC), 2nd International Cryogenic Materials Conference in Asia (Asian-ICMC), and CSSJ Joint Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Challenges to thermal limit, quantum limit, and high throughput based on SFQ circuits2020

    • Author(s)
      Akira Fujimaki, Masamitsu Tanaka, Nobuyuki Yoshikawa
    • Organizer
      2020 International Symposium on Superconductor Electronics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of gate-level-pipelined SFQ circuits toward ultra-high-speed cryogenic computing2020

    • Author(s)
      Masamitsu Tanaka, Ikki Nagaoka, Koki Ishida, Kyosuke Sano, Taro Yamashita, Takatsugu Ono, Koji Inoue, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Phase-shift flux qubit with a ferromagnetic π junction2020

    • Author(s)
      Taro Yamashita, Kun Zuo, Yoshiro Urade, Wei Qiu, Hirotaka Terai, Akira Fujimaki and Yasunobu Nakamura
    • Organizer
      merican Physical Society (APS) March meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NbN-based superconducting qubit on Si substrate2020

    • Author(s)
      Sunmi Kim, Tomoko Fuse, Fumiki Yoshihara, Wei Qiu, Taro Yamashita, Ziqiao Ao, Kouichi Semba, Hirotaka Terai
    • Organizer
      merican Physical Society (APS) March meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-throughput gate-level-pipelined SFQ multipliers2020

    • Author(s)
      Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Koji Inoue, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of datapath for 8 bit parallel SFQ microprocessors with gate level pipelines2020

    • Author(s)
      Ryota Kashima, Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simulation and comparison of the energy efficiency of half flux quantum circuits2020

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of SQUIDs with a period of half flux quantum in modulation patterns for half flux quantum circuits2020

    • Author(s)
      Yuto Takeshita, Feng Li, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of SQUIDs with a period of half flux quantum in modulation patterns for half flux quantum circuits2020

    • Author(s)
      Daiki Hasegawa, Yuto Takeshita, Feng Li, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development and evaluation of superconducting n anowire single photon detectors with dielectric multilayers2020

    • Author(s)
      Fumihiro China, Shigehito Miki, Masahiro Yabuno, Taro Yamashita, Hirotaka Terai
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of timing design by using low-power SFQ shift registers2020

    • Author(s)
      Manami Kuniyoshi, Ken Murase, Ikki Nagaoka, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Routing Method with Wire Length Matching for RSFQ Logic Circuits Using Thin PTLs2020

    • Author(s)
      Kei Kitamura, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Comparison of Clocking Schemes for SFQ Circuits2020

    • Author(s)
      Takahiro Kawaguchi, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Introduction of Planarized High-speed Standard Process (PHSTP) to CRAVITY Digital Process2020

    • Author(s)
      Mutsuo Hidaka, Shuichi Nagasawa, and Kazumasa Makise
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and Simulation of Single-Flux-Quantum Multiply-Accumulator2020

    • Author(s)
      Z. Li, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of an SFQ 8-symbol Complex Event Detector Corresponding to Regular Expressions2020

    • Author(s)
      Kazuma Akizuki, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of SFQ Convolutional Computation Processor for Convolutional Neural Network2020

    • Author(s)
      F. Ke, A. Ren, Y. Wang, O. Chen, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      13th Superconducting SFQ VLSI Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 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2020

    • Author(s)
      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
    • Organizer
      電子情報通信学会2020年総合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      加島亮太, 長岡一起, 田中雅光, 佐野京佑, 山下太郎, 藤巻朗
    • Organizer
      電子情報通信学会2020年総合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      長岡一起, 田中雅光, 佐野京佑, 山下太郎, 井上弘士, 藤巻朗
    • Organizer
      電子情報通信学会2020年総合大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      赤池宏之, 藤巻朗
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      山下太郎, Zuo Kun, 浦出芳郎, Qiu Wei, 寺井弘高, 藤巻朗, 中村泰信
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      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
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      中村颯, 加藤悠輝, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 接合付加による半磁束量子回路の低消費エネルギー化2020

    • Author(s)
      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
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 半磁束量子回路の実証に向けた動作解析2020

    • Author(s)
      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
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2020

    • Author(s)
      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
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ポイントコンタクトによる非従来型超伝導の検証2020

    • Author(s)
      伊藤誠一朗, 矢野力三, 山下太郎, 柏谷聡
    • Organizer
      日本物理学会 第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Developments of Nb-based Fabrication Process and Flip-chip Technology toward Superconductor Quantum Digital Systems2019

    • Author(s)
      Mutsuo Hidaka, Shuichi Nagasawa, and Kazumasa Makise
    • Organizer
      1st Workhop on Quantum and Classical Cryogenic Devices, Circuits, and Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical and experimental analysis on π-shifted SQUIDs for logic circuits and memories2019

    • Author(s)
      Akira Fujimaki, Yuto Takeshita, Daiki Hasegawa, Feng Li, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita
    • Organizer
      10th East Asia Symposium on Superconductor Electronics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Design and demonstration of superconducting single flux quantum circuits operating around 50 GHz2019

    • Author(s)
      Akira Fujimaki
    • Organizer
      22nd Workshop on Synthesis And System Integration of Mixed Information Technologies
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Impulse-driven high-speed matrix memory based on π-shifted Josephson junctions2019

    • Author(s)
      Akira Fujimaki, Yuto Takeshita, Tomohiro Kamiya, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Asynchronous Superconducting Digital Circuits2019

    • Author(s)
      Nobuyuki Yoshikawa
    • Organizer
      25th IEEE International Symposium on Asynchronous Circuits and Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Energy consumption of half flux quantum circuits using π-shifted Josephson junctions2019

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      32nd International Symposium on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Global Routing Method with Wire Length Budgeting for PTL Routing of SFQ Logic Circuits2019

    • Author(s)
      Kei Kitamura, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      32nd International Symposium on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scan Design with Clockless Logic Gates for SFQ Circuits2019

    • Author(s)
      Takahiro Kawaguchi, Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      32nd International Symposium on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and High-speed Test of an SFQ-based Single-chip FFT processor2019

    • Author(s)
      F. Ke, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      32nd International Symposium on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Single-Flux-Quantum Parallel Multiplier Using Accumulator Unit2019

    • Author(s)
      Z. Li, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      32nd International Symposium on Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NbN-based Superconducting Qubit on Si Substrate2019

    • Author(s)
      Sunmi Kim, Tomoko Fuse, Fumiki Yoshihara, Wei Qiu, Taro Yamashita, Ziqiao Ao, Kouichi Semba, Hirotaka Terai
    • Organizer
      ISNTT2019 Symposium
    • Related Report
      2019 Annual Research Report
  • [Presentation] π-phase-shift Flux Qubit with a Ferromagnetic Josephson Junction2019

    • Author(s)
      Taro Yamashita, K. Zuo, Y. Urade, Q. Wei, Hirotaka Terai, Akira Fujimaki, Yasunobu Nakamura
    • Organizer
      ISNTT2019 Symposium
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of NbN-based superconducting quantum circuit: 0-qubit and π-qubit2019

    • Author(s)
      Sunmi Kim, Taro Yamashita, Tomoko Fuse, Fumiki Yoshihara, Wei Qiu, Ziqiao Ao, Kouichi Semba, Hirotaka Terai
    • Organizer
      1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] π-shifted SQUID based circuits and applications for classical computing and beyond2019

    • Author(s)
      Masamitsu Tanaka, Yuto Takeshita, Daiki Hasegawa, Feng Li, Kyosuke Sano, Taro Yamashita, Akira Fujimaki
    • Organizer
      1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of nTrons triggered by SFQ signals in monolithic ICs of Josephson junctions and nTrons2019

    • Author(s)
      Kyosuke Sano, Naoki Kondo, Masamitsu Tanaka, Taro Yamashita, Masumi Inoue, Akira Fujimaki
    • Organizer
      1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Test Pattern Generation for Timing Faults in Rapid Single-Flux-Quantum Circuits2019

    • Author(s)
      Kazuyoshi Takagi, Mikihiro Ono, Nobutaka Kito, and Naofumi Takagi
    • Organizer
      The 22nd Workshop on Synthesis And System Integration of Mixed Information technologies
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Monolithic ICs of Josephson junctions and nTrons for large-capacity memories2019

    • Author(s)
      Kyosuke Sano, Naoki Kondo, Masamitsu Tanaka, Taro Yamashita, Masumi Inoue, Akira Fujimaki
    • Organizer
      14th European Conference on Applied Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Proposal of SQUIDs with a period of half flux quantum in modulation patterns2019

    • Author(s)
      Yuto Takeshita, Daiki Hasegawa, Tomohiro Kamiya, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      14th European Conference on Applied Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting flux qubit with NbN-based ferromagnetic π junction2019

    • Author(s)
      Taro Yamashita, Kun Zuo, Yoshiro Urade, Wei Qiu, Hirotaka Terai, Akira Fujimaki and Yasunobu Nakamura
    • Organizer
      14th European Conference on Applied Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-Speed Operation of a 13-bit 50-sample/period SFQ-based Sine Code Generator2019

    • Author(s)
      F. Ke, Yuki Yamanashi, T. Ortlepp, Nobuyuki Yoshikawa
    • Organizer
      14th European Conference on Applied Superconductivity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical analysis of low-power logic family based on half flux quantum using π-shifted Josephson junctions2019

    • Author(s)
      Masamitsu Tanaka, Tomohiro Kamiya, Yuto Takeshita, Yuta Yoshinomoto, Daiki Hasegawa, Kyosuke Sano, Taro Yamashita, Akira Fujimaki
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of an Energy-Efficient, Gate-Level-Pipelined 100 TOPS/W Arithmetic Logic Unit Based on Low-Voltage Rapid Single-Flux-Quantum Logic2019

    • Author(s)
      Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Koji Inoue, Akira Fujimaki
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetic Josephson junctions on Nb four-layer structure for half flux quantum circuits2019

    • Author(s)
      Daiki Hasegawa, Yuto Takeshita, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Placement and Routing Methods Based on Mixed Wiring of JTLs and PTLs for RSFQ Circuits2019

    • Author(s)
      Takashi Dejima, *Kazuyoshi Takagi, and Naofumi Takagi
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of an SFQ complex event detector for complex event processing2019

    • Author(s)
      Kazuma Akizuki, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of a single-flux-quantum microprocessor operating with a Josephson-CMOS hybrid memory2019

    • Author(s)
      Yuki Hironaka, T. Ortlepp, Yuki Yamanashi, Nobuyuki Yoshikawa
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of Single-Flux-Quantum Floating-Point Divider Based on Goldschmidt's Algorithm2019

    • Author(s)
      Yuki Yamanashi, A. Sanada, Nobuyuki Yoshikawa
    • Organizer
      17th International Superconductive Electronics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Phase-shift flux qubit with ferromagnetic π junction2019

    • Author(s)
      Taro Yamashita, Kun Zuo, Yoshiro Urade, Wei Qiu, Hirotaka Terai, Akira Fujimaki and Yasunobu Nakamura
    • Organizer
      20th Anniversary of Superconducting Qubits
    • Related Report
      2019 Annual Research Report
  • [Presentation] NbN-based superconducting quantum circuit on Si substrate2019

    • Author(s)
      Sunmi Kim, Taro Yamashita, Tomoko Fuse, Fumiki Yoshihara, Wei Qiu, Ziqiao Ao, Hirotaka Terai and Kouichi Semba
    • Organizer
      20th Anniversary of Superconducting Qubits
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2019

    • Author(s)
      長岡一起, 田中雅光, 佐野京佑, 山下太郎, 井上弘士, 藤巻朗
    • Organizer
      評価」, 電子情報通信学会2019年ソサイエティ大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Si基板上のNbNベース超伝導量子ビットのコヒーレンス特性評価2019

    • Author(s)
      金鮮美,山下太郎,布施智子,吉原文樹,丘偉,敖子,仙場浩一,寺井弘高
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 非従来型超伝導の検証を目指したポイントコンタクト装置の開発2019

    • Author(s)
      伊藤誠一朗, 矢野力三, 山下太郎, 柏谷聡
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2019

    • Author(s)
      近藤真生, 佐野京佑, 田中雅光, 山下太郎, 井上真澄, 藤巻朗
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 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2019

    • Author(s)
      長谷川大輝, 竹下雄登, 佐野京佑, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 磁場変調パターンが半磁束量子周期となるSQUIDの作製2019

    • Author(s)
      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
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] NbNフルエピタキシャル接合を用いた超伝導量子ビットの作製・評価2019

    • Author(s)
      寺井弘高, 金鮮美, 布施智子, 丘偉, 山下太郎, 吉原文樹, 仙場浩一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 超伝導高速単一磁束量子(RSFQ)回路のタイミング調節ための配線長予約を用いた概略配線手法2019

    • Author(s)
      北村圭, 高木直史, 高木一義
    • Organizer
      情報処理学会DAシンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 単一磁束量子回路に基づくゲートレベル・パイプライン算術論理演算器の高エネルギー効率化と0.3mW, 30GHz動作実証2019

    • Author(s)
      田中雅光, 長岡一起, 石田浩貴, 佐野京佑, 山下太郎, 小野貴継, 井上弘士, 藤巻朗
    • Organizer
      2019年並列/分散/協調処理に関する『北見』サマー・ワークショップ
    • Related Report
      2019 Annual Research Report
  • [Presentation] 100TOPS/W超伝導単一磁束量子演算器2019

    • Author(s)
      長岡一起, 田中雅光, 佐野京佑, 山下太郎, 井上弘士, 藤巻朗
    • Organizer
      LSIとシステムのワークショップ2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Design of a One-Instruction-Set SFQ Microprocessor for High-Speed Demonstration of SFQ/CMOS Hybrid System2019

    • Author(s)
      Y. Hironaka, Y. Yamanashi, N. Yoshikawa
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 56-GHz demonstration of a 13-bit 50-sample/period SFQ-based sine code generator using 10 kA/cm2 Nb process2019

    • Author(s)
      F. Ke, Y. Yamanashi, T. Ortlepp, N. Yoshikawa
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Compact High Selectivity In-Line Topology Filter Based on LTS Technology2019

    • Author(s)
      Y. He, N. Takeuchi, N. Yoshikawa
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Road to Superconductor-Based World-Fastest Computer2019

    • Author(s)
      A. Fujimaki, T. Kamiya, Y. Takeshita, H. Kato, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 0-p SQUID Based Matrix Memory Driven by SFQ Pulses2019

    • Author(s)
      Y. Takeshita, T. Kamiya, K. Sano, M. Tanaka, A. Fujimaki, T. Yamashita
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Hierarchical Placement Method with Cell Clustering for Rapid-Single-Flux-Quantum Circuits2019

    • Author(s)
      T. Dejima, K.Takagi, N. Takagi
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Global Routing Method with Wire Length Budgeting for SFQ Logic Circuits2019

    • Author(s)
      K. Kitamura, K.Takagi, N. Takagi
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Encoder/Decoder for the Compound Signal of Data and Clock2019

    • Author(s)
      T. Kawaguchi, K.Takagi, N. Takagi
    • Organizer
      12th Superconducting SFQ VLSI Workshop (SSV 2019)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 1-Gb Josephson-CMOSハイブリッドメモリに向けた超伝導ナノ構造ラインドライバの検討2019

    • Author(s)
      佐野京佑, 丸山晃平, 田中雅光, 山下太郎, 井上真澄, 藤巻朗
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] SFQパルス駆動マトリクスメモリの実現に向けた動作解析2019

    • Author(s)
      竹下雄登, 神谷智大, 佐野京佑, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Power-Controllable Superconducting AC/DC Converters for DC-Driven Energy- Efficient Single-Flux-Quantum Circuits2018

    • Author(s)
      A. Fujimaki, S. Taniguchi, H. Kato, H. Iwashita, T. Yamashita, M. Tanaka
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 30-GHz Operation of Datapath for Bit-Parallel, Gate-Level-Pipelined Rapid Single- Flux-Quantum Microprocessors2018

    • Author(s)
      M. Tanaka, Y. Hatanaka, Y. Matsui, I. Nagaoka, K. Ishida, K. Sano, T. Yamashita, O. Takatsugu, K. Inoue, A. Fujimaki
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DC-Offset-Free Quantum Flux Parametron using Ferromagnet Phase Shift Elements2018

    • Author(s)
      M. Tanaka, H. Ito, S. Taniguchi, H. Iwashita, K. Sano, T. Yamashita, A. Fujimaki
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Short turn-on-delay superconducting nanostructure transistors2018

    • Author(s)
      K. Sano, M. Suzuki, K. Maruyama, N. Kondo, M. Tanaka, T. Yamashita, M. Inoue, A. Fujimaki
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low-power half single flux quantum circuits based on π-shifted Josephson junctions2018

    • Author(s)
      T. Kamiya, Y. Takeshita, K. Sano, M. Tanaka, T. Yamashita, A. Fujimaki
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and demonstration of an SFQ-based full-component singlechip FFT processor2018

    • Author(s)
      F. Ke, Y. Yamanashi, N. Yoshikawa
    • Organizer
      Applied Superconductivity Conference (ASC2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and evaluation of a one-instruction-set single-flux-quantum microprocessor for the demonstration of Josephson-CMOS hybrid system2018

    • Author(s)
      Y. Hironaka, Y. Yamanashi, N. Yoshikawa
    • Organizer
      The 31st International Symposium on Superconductivity (ISS2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and demonstration of an 8-bit 18-sample/cycle sine code generator using single-flux-quantum circuits2018

    • Author(s)
      F. Ke, Y. Yamanashi, T. Ortlepp, N. Yoshikawa
    • Organizer
      The 31st International Symposium on Superconductivity (ISS2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical Analysis of Low-Power Half Single Flux Quantum Circuits Based on 0-π SQUIDs2018

    • Author(s)
      M. Tanaka, Y. Yoshinomoto, T. Kamiya, K. Sano, T. Yamashita, A. Fujimaki
    • Organizer
      The 31st International Symposium on Superconductivity (ISS2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Progress in DC-powered single-flux-quantum integrated circuits2018

    • Author(s)
      A. Fujimaki, K. Sano, T. Yamashita, M. Tanaka
    • Organizer
      4th International Workshop on Superconducting Sensors and Detectors (IWSSD 2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New Circuits for Highly Sensitive Sensers and for Energy-Efficient Logics2018

    • Author(s)
      A. Fujimaki, T. Kamiya, K. Sano, T. Yamachita, M. Tanaka
    • Organizer
      Workshop on the Future of Silicon Detector Technologies (FuTuRe II)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導単一磁束量子(SFQ)回路設計のためのタイミング制約を考慮した自動配置アルゴリズム2018

    • Author(s)
      出島貴史、高木一義、高木直史
    • Organizer
      情報処理学会 DAシンポジウム2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 大規模SFQ論理回路のパルス到着タイミングを最適化する配置手法2018

    • Author(s)
      北村圭、高木一義、高木直史
    • Organizer
      電子情報通信学会エレクトロニクスソサイエティ大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 単一磁束量子回路とナノクライオトロンのモノリシック化の検討2018

    • Author(s)
      丸山晃平, 佐野京佑, 田中雅光, 山下太郎, 井上真澄, 藤巻朗
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 強磁性πジョセフソン接合を用いたトグルフリップフロップの作製2018

    • Author(s)
      神谷智大, 竹下雄登, 佐野京佑, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] SFQパルス駆動マトリクスメモリの開発2018

    • Author(s)
      竹下雄登, 神谷智大, 田中雅光, 佐野京佑, 藤巻朗
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Patent(Industrial Property Rights)] 可変超伝導位相シフタ、ダイオード素子および整流器2024

    • Inventor(s)
      李峰 田中雅光 藤巻朗
    • Industrial Property Rights Holder
      李峰 田中雅光 藤巻朗
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2024-013168
    • Filing Date
      2024
    • Related Report
      2022 Annual Research Report
  • [Funded Workshop] The Joint Workshop of 15th Superconducting SFQ VLSI Workshop (SSV 2022) and 4th Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2022)2022

    • Related Report
      2022 Annual Research Report
  • [Funded Workshop] The Joint Workshop of 14th Superconducting SFQ VLSI Workshop (SSV 2021) and 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2021)2021

    • Related Report
      2021 Annual Research Report
  • [Funded Workshop] 13th Superconducting SFQ VLSI Workshop2020

    • Related Report
      2019 Annual Research Report
  • [Funded Workshop] 1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems2019

    • Related Report
      2019 Annual Research Report
  • [Funded Workshop] 12th Superconducting SFQ VLSI Workshop (SSV 2019)2019

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-25   Modified: 2025-02-04  

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