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Study on Quantum Mechanical Limit of Operating Speed in Single-Flux-Quantum Circuits

Research Project

Project/Area Number 18H01498
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionNagoya University

Principal Investigator

Tanaka Masamitsu  名古屋大学, 工学研究科, 助教 (10377864)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Keywords単一磁束量子回路 / 超伝導デバイス / ビット誤り率 / 低消費電力 / 高エネルギ効率 / 量子ゆらぎ / 窒化ニオブ / 窒化ニオブ接合 / 超伝導トンネル接合 / 微小ジョセフソン接合
Outline of Final Research Achievements

This research aims to pursue logic circuits operating near the quantum mechanical limit by superconductor single-flux-quantum (SFQ) circuits, by which high-speed and low-energy operations are compatible. The study on high-speed operations revealed that complex SFQ circuits could achieve 50-GHz clock frequencies by the developed precise timing design techniques and more than 100 GHz by further optimization based on the current fabrication process. Evaluations of speedup by partially removing shunt resistors, junction scaling, and niobium nitride Josephson junctions were also conducted. The detailed investigation on low-energy operation showed the relationship between energy consumption and operating speed in lowered currents and/or voltages.

Academic Significance and Societal Importance of the Research Achievements

一般に、論理回路には高速性と消費電力の間にトレードオフの関係があり、両立は困難である。SFQ回路においては、動作速度に対して配線遅延や発熱が律速要因にならないため、本研究で示したような、徹底的な動作速度の向上と低エネルギー化を同時に進めると、究極的には量子力学的不確定性が論理回路の動作速度の限界を決定するのか?という問いに行き当たると考えられる。本研究での成果は、超伝導回路の将来性を議論するために必要不可欠なだけでなく、論理回路の物理的限界の学理解明に向けた第一歩と考えられる。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (64 results)

All 2022 2021 2020 2019 2018 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (58 results) (of which Int'l Joint Research: 26 results,  Invited: 8 results) Remarks (1 results)

  • [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
      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] 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 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 2020 Annual Research Report
    • Peer Reviewed
  • [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
  • [Presentation] Study on magnetic properties of π-junction-based artificial spin systems2021

    • Author(s)
      M. Higashi, Y. Takeshita, K. Kato, H. Fujisawa, F. Li, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of half-flux-quantum T-flip flops made up with only π junctions2021

    • Author(s)
      F. Li, Y. Takeshita, K. Kato, M. Higashi, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Implementation of a high-throughput bit-parallel microprocessor using single-flux-quantum logic2021

    • Author(s)
      I. Nagaoka, R. Kashima, T. Nakano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      15th European Conference on Applied Superconductivity (EUCAS 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Low-power half-flux-quantum circuits and the fabrication process based on ferromagnetic SFIS Josephson junctions2021

    • Author(s)
      F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, and A. 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] Half-flux-quantum circuits using π-shifted ferromagnetic junctions2021

    • Author(s)
      F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      34th International Symposium on Superconductivity (ISS2 021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] フィードバックパスを伴う単一磁束量子回路の高スループット・低レイテンシ化2021

    • Author(s)
      加島亮太, 長岡一起, 中埜智貴, 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
      2021 Annual Research Report
  • [Presentation] 10kA/cm2プロセスを用いた単一磁束子100GHzビット並列加算器の実証2021

    • Author(s)
      中埜智貴, 長岡一起, 加島亮太, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高透磁率を得るためのπ接合を用いた人工スピン系の提案2021

    • Author(s)
      東正志, 竹下雄登, 加藤健人, 藤澤日向, 李峰, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] π-π-π SQUIDに基づく半磁束量子Tフリップフロップ2021

    • Author(s)
      李峰, 竹下雄登, 東正志, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 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浮動小数点演算器の設計2021

    • Author(s)
      長岡一起, 加島亮太, 田中雅光, 山下太郎, 川上哲志, 井上弘士, 藤巻朗
    • Organizer
      ,2021年電子情報通信学会ソサイエティ大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] アンシャント接合による加算器の高速化2021

    • Author(s)
      国吉真波, 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ソサイエティ大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 低レイテンシ化を目的としたインターリーブ方式レジスタを伴う単一磁束量子データパスの動作実証2021

    • Author(s)
      加島亮太, 長岡一起, 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ソサイエティ大会
    • Related Report
      2021 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浮動小数点演算器の動作実証2021

    • Author(s)
      長岡一起, 加島亮太, 田中雅光, 川上哲志, 谷本輝夫, 山下太郎, 井上弘士, 藤巻朗
    • Organizer
      2022年電子情報通信学会総合会大
    • Related Report
      2021 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浮動小数点演算器の動作実証2021

    • Author(s)
      長岡一起, 加島亮太, 田中雅光, 川上哲志, 谷本輝夫, 山下太郎, 井上弘士, 藤巻朗
    • Organizer
      2022年電子情報通信学会総合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] π-π-π SQUIDs: The Switching Element of HFQ Circuits Operating at mK2021

    • Author(s)
      F. Li, D. Pham, Y. Takeshita, K. Kato, M. Tanaka, T. Yamashita, and A. 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] 量子ビットとのモノリシック実装に向けたNbNベース超低消費電力単一磁束量子回路の設計2021

    • Author(s)
      中山彪之助, 上田伴春, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 25 kA/cm2 Nb/Al/AlOx/Al/Nb接合を用いた単一磁束量子シフトレジスタの170 GHz動作2021

    • Author(s)
      田中雅光, 山下太郎, 藤巻朗, 牧瀬圭正, 永沢秀一, 日高睦夫
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] アンシャント接合によるSFQ論理ゲートのエネルギー効率の向上2021

    • Author(s)
      国吉真波, 長岡一起, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      電子情報通信学会2021年総合大会
    • 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
      電子情報通信学会2021年総合大会
    • 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
      電子情報通信学会2021年総合大会
    • 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] Proposal of SFQ annealer using π-junction-based SQUIDs operating at 4 K2020

    • Author(s)
      M. Higashi, D. Hasegawa, Y. Takeshita, F. Li, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference
    • 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)
      I. Nagaoka, K. Ishida, M. Tanaka, K. Sano, T. Yamashita, T. Ono, K. Inoue, and A. Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference
    • 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)
      K. Kitamura, M. Tanaka, T. Kawaguchi, I. Nagaoka, K. Takagi, A. Fujimaki, and N. Takagi
    • Organizer
      2020 Applied Superconductivity Conference
    • 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)
      M. Kuniyoshi, K. Murase, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference
    • 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)
      F. Li, Y. Takeshita, D. Hasegawa, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 50-GHz datapath for parallel SFQ microprocessors based on gate-level-pipeline architecture2020

    • Author(s)
      R. Kashima, I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, and A. Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Extremely energy-efficient processing using superconductor circuits near physical limits2020

    • Author(s)
      M. Tanaka, M. Kuniyoshi, K. Murase, I. Nagaoka, T. Yamashita, and A. Fujimaki
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 広帯域配線を備えた超伝導デジタル回路用冷凍機システムの特性評価2020

    • Author(s)
      村瀬健, 藤巻朗, 山下太郎, 田中雅光, 佐野京佑
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] SFQアニーラにおける隣接するスピン間の相互作用の影響2020

    • Author(s)
      東正志, 長谷川大輝, 竹下雄登, 李峰, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第81回応用物理学会秋季学術講演会
    • 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] フィードバックループを含む単一磁束量子回路の高周波設計に向けたカウンターフロー方式シフトレジスタのタイミング解析2020

    • Author(s)
      長岡一起, 加島亮太, 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] Development of 50-GHz, high-throughput rapid single-flux-quantum circuits toward ultra-fast, energy-efficient computing2020

    • Author(s)
      M. Tanaka, I. Nagaoka, K. Sano, T. Yamashita, K. Ishida, T. Ono, K. Inoue, and A. 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)
      A. Fujimaki, M. Tanaka, and N. Yoshikawa
    • Organizer
      2020 International Symposium on Superconductor Electronics / 13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • 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)
      M. Tanaka, I. Nagaoka, K. Ishida, K. Sano, T. Yamashita, T. Ono, K. Inoue, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Design of datapath for 8 bit parallel SFQ microprocessors with gate level pipelines2020

    • Author(s)
      R. Kashima, I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-throughput gate-level-pipelined SFQ multipliers2020

    • Author(s)
      I. Nagaoka, M. Tanaka, K. Sano, T. Yamashita, K. Inoue, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of timing design by using low-power SFQ shift registers2020

    • Author(s)
      M. Kuniyoshi, K. Murase, I. Nagaoka, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • 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)
      F. Li, Y. Takeshita, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • 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)
      Y. Takeshita, F. Li, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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] 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] 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] 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] 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] 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(SWoPP2019)
    • Related Report
      2019 Annual Research Report
  • [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)
      Nagaoka, M. Tanaka, K. Sano, T. Yamashita, K. Inoue, and A. Fujimaki
    • Organizer
      17th Int. Supercond. Electron. Conf. (ISEC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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
      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] Design and demonstration of superconducting single flux quantum circuits operating around 50 GHz2019

    • Author(s)
      A. Fujimaki
    • Organizer
      22nd Workshop on Synthesis And System Integration of Mixed Information Technologies (SASIMI 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] π-shifted SQUID based circuits and applications for classical computing and beyond2019

    • Author(s)
      M. Tanaka, Y. Takeshita, D. Hasegawa, F. Li, K. Sano, T. Yamashita, and A. Fujimaki
    • Organizer
      1st Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Energy consumption of half flux quantum circuits using π-shifted josephson junctions2019

    • Author(s)
      F. Li, Y. Takeshita, D. Hasegawa, K. Sano, M. Tanaka, T. Yamashita, and A. Fujimaki
    • Organizer
      32nd Int. Symp. Supercond. (ISS 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単一磁束量子ゲートレベルパイプラインマイクロプロセッサに向けた30GHzデータパスの開発2019

    • Author(s)
      長岡一起, 畑中湧貴, 松井裕一, 石田浩貴, 田中雅光, 佐野京佑, 山下太郎, 小野貴継, 井上弘士, 藤巻朗
    • Organizer
      電子情報通信学会超伝導エレクトロニクス研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ビット並列演算ゲートレベルパイプラインを用いた単一磁束量子乗算器における高周波動作の評価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
      電子情報通信学会2019年総合大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 半磁束量子を情報担体とした低エネルギー信号伝搬2018

    • Author(s)
      田中雅光, 吉ノ元優太, 神谷智大, 佐野京佑, 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] 0.1W, 4K GM冷凍機を用いた単一磁束量子デジタル回路システム2018

    • Author(s)
      田中雅光, 近藤真生, 佐野京佑, 山下太郎, 藤巻朗
    • Organizer
      第97回低温工学・超電導学会
    • Related Report
      2018 Annual Research Report
  • [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
      31st International Symposium on Superconductivity
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A 48GHz 5.6mW gate-level-pipelined multiplier using single-flux quantum logic2018

    • Author(s)
      I. Nagaoka, M. Tanaka, K. Inoue, A. Fujimaki
    • Organizer
      IEEE International Solid-State Circuits Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 単一磁束量子集積回路測定結果データベースLeporis

    • URL

      https://leporis.org/

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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