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Large-scale superconducting spintronics quantum computing circuits toward the realization of quantum supremacy

Research Project

Project/Area Number 19H05615
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Review Section Broad Section C
Research InstitutionTohoku University (2022-2023)
Nagoya University (2019-2021)

Principal Investigator

Yamashita Taro  東北大学, 工学研究科, 教授 (60567254)

Co-Investigator(Kenkyū-buntansha) 竹内 尚輝  国立研究開発法人産業技術総合研究所, 量子・AI融合技術ビジネス開発グローバル研究センター, 主任研究員 (00746472)
田中 雅光  名古屋大学, 工学研究科, 准教授 (10377864)
猪股 邦宏  国立研究開発法人産業技術総合研究所, 量子・AI融合技術ビジネス開発グローバル研究センター, 研究チーム長 (50525772)
宮嶋 茂之  国立研究開発法人情報通信研究機構, 未来ICT研究所神戸フロンティア研究センター, 主任研究員 (50708055)
Project Period (FY) 2019-06-26 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥203,580,000 (Direct Cost: ¥156,600,000、Indirect Cost: ¥46,980,000)
Fiscal Year 2023: ¥23,920,000 (Direct Cost: ¥18,400,000、Indirect Cost: ¥5,520,000)
Fiscal Year 2022: ¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2021: ¥31,850,000 (Direct Cost: ¥24,500,000、Indirect Cost: ¥7,350,000)
Fiscal Year 2020: ¥39,390,000 (Direct Cost: ¥30,300,000、Indirect Cost: ¥9,090,000)
Fiscal Year 2019: ¥84,370,000 (Direct Cost: ¥64,900,000、Indirect Cost: ¥19,470,000)
Keywords量子計算 / 超伝導 / 超伝導スピントロニクス / モノリシック素子 / 量子回路 / ジョセフソン接合 / スピントロニクス / モノリシック
Outline of Research at the Start

量子計算分野において、古典計算機を凌駕する計算能力を表す「量子超越性」の実験的実証は、全世界的に喫緊の研究課題として注目されている。その実証には、量子回路の大規模化(量子ビット数の増加)を、コヒーレンス時間(量子状態を保持可能な時間)等の性能劣化なく達成することが必要不可欠である。本研究では、本研究チームが誇る大規模化可能なπ接合量子回路と超低消費電力性を有する半磁束量子回路という世界最高峰のコア技術を融合することで量子超越性の実証を目指す。

Outline of Final Research Achievements

We developed novel quantum computing circuit by introducing a superconducting spintronic element "π-junction" with a hybrid structure of superconductor and ferromagnet. As a quantum bit, we demonstrated a flux-bias-free flux-type quantum bits (pi-qubits) for the first time and improved their performance. For quantum control circuits, we have demonstrated a half-flux-quantum circuits to achieve the ultralow power consumption by introducing the π-junction, and also quantum control circuits with low power consumption. We finally succeeded in demonstrating the quantum control using flux-quantum pulses in monolithic quantum computing circuits, and established the fundamental technology for large-scale quantum computing circuits to realize the quantum supremacy.

Academic Significance and Societal Importance of the Research Achievements

本研究により実証・創出した、バイアス不要で集積化に適したπ量子ビットや、超低消費電力性を示す新規超伝導量子制御回路、そしてそれらをオンチップ化したモノリシック量子計算回路は、大規模集積化が進行中の超伝導量子計算機の実現に向け、現状の量子計算機の大規模化における配線数増大を始めとする主要課題群を解決へと導く、新しい超伝導スピントロニクス量子技術という意義を有する。本技術が超伝導量子計算機の大規模化に向けたブレークスルーとなることが期待される。

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 on the whole though the progress in a part of the research has been delayed.

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 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Abstract (Interim Assessment) ( PDF )   Annual Research Report   Interim Assessment (Comments) ( PDF )
  • 2020 Annual Research Report
  • 2019 Abstract ( PDF )   Comments on the Screening Results ( PDF )   Annual Research Report
  • Research Products

    (216 results)

All 2024 2023 2022 2021 2020 2019 Other

All Journal Article (31 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 29 results,  Open Access: 12 results) Presentation (178 results) (of which Int'l Joint Research: 95 results,  Invited: 42 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results) Funded Workshop (4 results)

  • [Journal Article] Control Circuits for Superconducting Qubits:2024

    • Author(s)
      TAKEUCHI Naoki、FUKETA Hiroshi、YAMASHITA Taro、YAMAMOTO Tsuyoshi
    • Journal Title

      TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)

      Volume: 59 Issue: 2 Pages: 71-79

    • DOI

      10.2221/jcsj.59.71

    • ISSN
      0389-2441, 1880-0408
    • Year and Date
      2024-03-20
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microwave characterization of tantalum superconducting resonators on silicon substrate with niobium buffer layer2024

    • Author(s)
      Urade Yoshiro、Yakushiji Kay、Tsujimoto Manabu、Yamada Takahiro、Makise Kazumasa、Mizubayashi Wataru、Inomata Kunihiro
    • Journal Title

      APL Materials

      Volume: 12 Issue: 2

    • DOI

      10.1063/5.0165137

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] NbN-based half-flux-quantum element for integration with superconducting qubits2024

    • Author(s)
      Naoki Takeuchi, Mikiya Naruse, Shigeyuki Miyajima, Duong Pham, Hirotaka Terai, Masamitsu Tanaka, Taro Yamashita
    • Journal Title

      Applied Physics Letters

      Volume: 124 Issue: 15

    • DOI

      10.1063/5.0203046

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Study on Physical Reservoir Computing With Josephson Junctions2024

    • Author(s)
      Watanabe Kohki、Mizugaki Yoshinao、Moriya Satoshi、Yamamoto Hideaki、Yamashita Taro、Sato Shigeo
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 34 Issue: 3 Pages: 1-4

    • DOI

      10.1109/tasc.2024.3350576

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconducting flux qubit with ferromagnetic Josephson pi junction operating at zero magnetic field2024

    • Author(s)
      Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito, Taro Yamashita, Kouichi Semba
    • Journal Title

      arXiv:2401.14597(Communications Materialsに投稿中)

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] NbN-based tunnel-type π-junctions for low-power half-flux-quantum circuits2024

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

      Superconductor Science and Technologyに2024年4月9日受理済み

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Scalable quantum-bit controller using adiabatic superconductor logic2024

    • Author(s)
      Naoki Takeuchi, Taiki Yamae, Taro Yamashita, Tsuyoshi Yamamoto, and Nobuyuki Yoshikawa
    • Journal Title

      arXiv:2310.06544(npj Quantum Informationに投稿中)

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Quantum Microwave Parametric Interferometer2023

    • Author(s)
      Kronowetter F.、Fesquet F.、Renger M.、Honasoge K.、Nojiri Y.、Inomata K.、Nakamura Y.、Marx A.、Gross R.、Fedorov K.G.
    • Journal Title

      Physical Review Applied

      Volume: 20 Issue: 2 Pages: 024049-024049

    • DOI

      10.1103/physrevapplied.20.024049

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Classical SPICE simulation of superconducting quantum circuits2023

    • Author(s)
      Tanamoto Tetsufumi、Ishikawa Toyofumi、Inomata Kunihiro、Masuda Shumpei、Omuma Tamio、Kawabata Shiro
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 3 Pages: 034501-034501

    • DOI

      10.35848/1882-0786/acc3d8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [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
      2023 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] 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] 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] 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] Parameter Design Method for the Adiabatic Quantum-Flux-Parametron Towards Ultra-Low-Power Computing2022

    • Author(s)
      竹内 尚輝、山栄 大樹、鈴木 秀雄、吉川 信行
    • Volume
      J105-C
    • Issue
      11
    • Pages
      329-338
    • DOI

      10.14923/transelej.2022JCI0003

    • ISSN
      1881-0217
    • Year and Date
      2022-11-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [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] Magnetic Josephson Junctions: New Phenomena and Physics with Diluted Alloy, Conventional Ferromagnet, and Multilayer Barriers2021

    • Author(s)
      Yamashita Taro
    • Journal Title

      IEICE Transactions on Electronics

      Volume: E104.C Issue: 9 Pages: 422-428

    • DOI

      10.1587/transele.2020SUI0004

    • NAID

      130008082175

    • ISSN
      0916-8524, 1745-1353
    • Year and Date
      2021-09-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Superconductor Processor Architecture2021

    • Author(s)
      INOUE Koji、TANAKA Masamitsu、ISHIDA Koki
    • Journal Title

      TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)

      Volume: 56 Issue: 2 Pages: 87-93

    • DOI

      10.2221/jcsj.56.87

    • NAID

      130008001851

    • ISSN
      0389-2441, 1880-0408
    • Year and Date
      2021-03-20
    • Related 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] Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate2021

    • Author(s)
      Kim Sunmi、Terai Hirotaka、Yamashita Taro、Qiu Wei、Fuse Tomoko、Yoshihara Fumiki、Ashhab Sahel、Inomata Kunihiro、Semba Kouichi
    • Journal Title

      Communications Materials

      Volume: 2 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s43246-021-00204-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental quantum teleportation of propagating microwaves2021

    • Author(s)
      Fedorov Kirill G.、Renger Michael、Pogorzalek Stefan、Di Candia Roberto、Chen Qiming、Nojiri Yuki、Inomata Kunihiro、Nakamura Yasunobu、Partanen Matti、Marx Achim、Gross Rudolf、Deppe Frank
    • Journal Title

      Science Advances

      Volume: 7 Issue: 52 Pages: 1-7

    • DOI

      10.1126/sciadv.abk0891

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Beyond the standard quantum limit for parametric amplification of broadband signals2021

    • Author(s)
      Renger M.、Pogorzalek S.、Chen Q.、Nojiri Y.、Inomata K.、Nakamura Y.、Partanen M.、Marx A.、Gross R.、Deppe F.、Fedorov K. G.
    • Journal Title

      npj Quantum Information

      Volume: 7 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s41534-021-00495-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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
      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
      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
      2020 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
      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
  • [Journal Article] π phase shifter based on NbN-based ferromagnetic Josephson junction on a silicon substrate2020

    • Author(s)
      Yamashita Taro、Kim Sunmi、Kato Haruki、Qiu Wei、Semba Kouichi、Fujimaki Akira、Terai Hirotaka
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 13687-13687

    • DOI

      10.1038/s41598-020-70766-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Secure quantum remote state preparation of squeezed microwave states2019

    • Author(s)
      Pogorzalek S.、Fedorov K. G.、Xu M.、Parra-Rodriguez A.、Sanz M.、Fischer M.、Xie E.、Inomata K.、Nakamura Y.、Solano E.、Marx A.、Deppe F.、Gross R.
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1

    • DOI

      10.1038/s41467-019-10727-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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
  • [Presentation] NbN-based flux qubit with ferromagnetic π-junction2024

    • Author(s)
      Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab1, Shiro Saito, Taro Yamashita, and Kouichi Semba
    • Organizer
      The American Physical Society's March Meeting 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scalable superconducting flux quantum bits with large-area Josephson junctions2024

    • Author(s)
      Tokunoshin Uchida, Hiroki Kutsuma, Taro Yamashita
    • Organizer
      PASPS-27
    • Related Report
      2023 Annual Research Report
  • [Presentation] 量子ビット応用に向けたアンダーダンプ型特性を有するNbN/AlN/CuNi/NbN接合2024

    • Author(s)
      栗原 大輝、本田 浩輝、沓間 弘樹、山下 太郎
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] MgO基板上に作製したコプレーナ線路共振器の損失評価2024

    • Author(s)
      渡邊 紘基、沓間 弘樹、金 鮮美、山下 太郎
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] πシフトジョセフソン接合を用いた単一磁束量子非破壊読み出しフリップフロップの動作実証2024

    • Author(s)
      出口創万, 上田伴春, 李峰, 田中雅光, 藤巻朗
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Scalable and Flux-bias-free Superconducting Flux Quantum Bits2023

    • Author(s)
      Taro Yamashita
    • Organizer
      MRM2023/IUMRS-ICA2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導スピントロニクスによるスケーラブルな超伝導量子回路2023

    • Author(s)
      山下太郎
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Novel superconducting flux quantum bits toward large-scale quantum circuits2023

    • Author(s)
      Taro Yamashita
    • Organizer
      15th international workshop on High Temperature Superconductors in High Frequency Fields (HTSHFF2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導量子デバイスの基礎と最近の進展2023

    • Author(s)
      山下太郎
    • Organizer
      電子情報通信学会 超伝導エレクトロニクス研究専門委員会、夏の超伝導エレクトロニクスセミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Superconductor Digital Circuits: Recent Progress and Quantum Applications2023

    • Author(s)
      Naoki Takeuchi
    • Organizer
      International Network on Quantum Annealing 2023 (INQA 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Low-power operation of half-flux-quantum circuits2023

    • Author(s)
      Masamitsu Tanaka, Shoma Tanemura, Toranosuke Nakayama, Masayuki Higashi, Feng Li, and Akira Fujimaki
    • Organizer
      36th International Symposium on Superconductivity
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design, fabrication, and measurement of capacitively-shunted π-flux qubit controlled by monolithically-integrated SFQ circuit2023

    • Author(s)
      Duong Pham, Tomoharu Ueda, Shigeyuki Miyajima, Hirotaka Terai, Kunihiro Inomata, Masamitsu Tanaka, Akira Fujimaki, and Taro Yamashita
    • Organizer
      Joint workshop of QCCC2023, SSV2023, and IWSQMD2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of scalable self-shunted flux qubits with large-area Josephson junctions2023

    • Author(s)
      Tokunoshin Uchida, Hiroki Kutsuma, and Taro Yamashita
    • Organizer
      Joint workshop of QCCC2023, SSV2023, and IWSQMD2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication process for superconducting devices based on nitride superconductors including ferromagnetic Josephson junction2023

    • Author(s)
      Shigeyuki Miyajima, Hirotaka Terai, Taro Yamashita, Duong Pham, Masamitsu Tanaka, Shigehito Miki
    • Organizer
      Joint workshop of QCCC2023, SSV2023, and IWSQMD2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Energy Efficient Half-flux-quantum Circuit Aiming at Milli-kelvin Stage Operation2023

    • Author(s)
      Feng Li, Duong Pham, Yuto Takeshita, Shoma Tanemura, Masayuki Higashi, Taro Yamashita, Masamitsu Tanaka and Akira Fujimaki
    • Organizer
      The 18th International Superconductive Electronics Conference (ISEC 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flux-bias-free superconducting flux qubits with coplanar waveguide resonator2023

    • Author(s)
      Taro Yamashita, Kunihiro Inomata, Duong Pham, Hirotaka Terai
    • Organizer
      16th European Conference on Applied Superconductivity (EUCAS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Self-shunted flux qubit for scalable superconducting quantum computer2023

    • Author(s)
      Tokunoshin Uchida, Hiroki Kutsuma, Taro Yamashita
    • Organizer
      16th European Conference on Applied Superconductivity (EUCAS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical study on physical reservoir computing with Josephson junctions2023

    • Author(s)
      Kohki Watanabe, Yoshinao Mizugaki, Satoshi Moriya, Hideaki Yamamoto, Taro Yamashita, Shigeo Sato
    • Organizer
      16th European Conference on Applied Superconductivity (EUCAS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Epitaxial tunnel junctions for nitride superconducting qubits2023

    • Author(s)
      Hirotaka Terai, Sunmi Kim, Taro Yamashita, Kunihiro Inomata, Fumiki Yoshihara, and Kouichi Semba
    • Organizer
      16th European Conference on Applied Superconductivity (EUCAS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Niobium-nitride-based superconducting flux qubit with π-phase shifter2023

    • Author(s)
      Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Taro Yamashita, Shiro Saito, and Kouichi Semba
    • Organizer
      16th European Conference on Applied Superconductivity (EUCAS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] New-generation superconducting flux quantum bits for scalable quantum computer2023

    • Author(s)
      Taro Yamashita
    • Organizer
      Workshop Emerging Platforms for Quantum Computing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting microwave resonators based on room-temperature-grown tantalum thin films2023

    • Author(s)
      Y. Urade, K. Yakushiji, M. Tsujimoto, T. Yamada, K. Makise, W. Mizubayashi, and K. Inomata
    • Organizer
      SQA Conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of a Josephson Traveling-Wave Parametric Amplifier with an AlOx Dielectric for Capacitors2023

    • Author(s)
      T. Yamada, Y. Urade, T. Ishikawa, M. Tsujimoto, G. Fujii, S. Nagasawa, Y. Nakashima, W. Mizubayashi, and K. Inomata
    • Organizer
      Joint workshop of QCCC2023, SSV2023, and IWSQMD2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超伝導自己シャント型磁束量子ビットの提案と検証2023

    • Author(s)
      内田徳之新、沓間弘樹、山下 太郎
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 窒化物ジョセフソン接合を用いたMerged-Element Transmon の設計2023

    • Author(s)
      渡邊紘基、栗原大輝、内田徳之新、沓間弘樹、山下太郎
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超伝導量子ビット応用に向けた窒化物ジョセフソン接合の開発2023

    • Author(s)
      寺井弘高、サイスイリカンス アバパッリ、金鮮美、猪股邦宏、山下太郎、布施智子、吉原文樹、仙場浩一
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 窒化物系超伝導体に基づく磁性接合を含む集積回路プロセスの開発2023

    • Author(s)
      宮嶋茂之,寺井弘高,山下太郎,田中雅光,竹内尚輝,三木茂人
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] π-π-π SQUIDにおける共振ステップの観測2023

    • Author(s)
      堀裕貴, 李峰, 中山彪之助, 東正志, 田中雅光, 藤巻朗
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 自己シャント型超伝導磁束量子ビットの提案と設計2023

    • Author(s)
      内田徳之新、沓間弘樹、山下太郎
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 多量子ビット制御に向けたNbNベース単一磁束量子スイッチ制御付き4 出力分岐回路2023

    • Author(s)
      上田伴春、宮嶋茂之、寺井弘高、Pham Duong、田中雅光、山下太郎、西村治道、藤巻朗
    • Organizer
      電子情報通信学会ソサエティ大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Niobium nitride based ferromagnetic Josephson junctions toward quantum applications2023

    • Author(s)
      Taro Yamashita
    • Organizer
      The 11th East Asia Symposium on Superconductor Electronics (EASSE 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress in superconducting qubits with nitride superconductors2023

    • Author(s)
      H. Terai, S. Kim, T. Yamashita, K. Inomata, T. Fuse, F. Yoshihara, K. Semba
    • Organizer
      The 11th East Asia Symposium on Superconductor Electronics (EASSE 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconducting flux quantum bits with scalable structures2023

    • Author(s)
      Taro Yamashita
    • Organizer
      Research Workshop on Superconductivity and Quantum Technology
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Superconducting devices for quantum computing and detector applications2023

    • Author(s)
      Taro Yamashita
    • Organizer
      International Workshop of Spin/Quantum Materials and Devices (IWSQMD)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting qubits based on nitride superconductors2023

    • Author(s)
      Hirotaka Terai, Sunmi Kim, Taro Yamashita, Kunihiro Inomata, Tomoko Fuse, Fumiki Yoshihara, Kouichi Semba
    • Organizer
      Research Workshop on Superconductivity and Quantum Technology
    • Related Report
      2022 Annual Research Report
  • [Presentation] Coherence properties of NbN-based superconducting flux qubit with π-phase shifter2023

    • Author(s)
      Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Taro Yamashita, Shiro Saito, Kouichi Semba
    • Organizer
      Research Workshop on Superconductivity and Quantum Technology
    • Related Report
      2022 Annual Research Report
  • [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, 寺井弘高, 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] 超伝導量子コンピューティングのための極低温測定システム2023

    • Author(s)
      猪股邦宏
    • Organizer
      「半導体エンジニアのための量子コンピューティング入門」~超伝導量子ビットからクライオCMOSまで、基礎と最新の技術動向~
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Josephson Traveling-Wave Parametric Amplifier ~Fabrication and Characterization~2023

    • Author(s)
      Kunihiro Inomata
    • Organizer
      Research Workshop on Superconductivity and Quantum Technology
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 低温エレクトロニクス2023

    • Author(s)
      田中雅光
    • Organizer
      応用物理学会シリコンテクノロジー分科会横断的研究集会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 半磁束量子回路のパラメータ設計指針2023

    • Author(s)
      種村匠真, 中山彪之助, 竹下雄登, 李峰, 田中雅光, 藤巻朗
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新規量子デバイス創出に向けた超伝導スピントロニクス技術2022

    • Author(s)
      山下太郎
    • Organizer
      第28回渦糸物理ワークショップ(28th Vortex Physics Workshop Japan)
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Novel ferromagnet/superconductor hybrid quantum devices2022

    • Author(s)
      Taro Yamashita
    • Organizer
      2022 Japan-Taiwan Advanced Quantum Technology Research and Development Workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 窒化物超伝導量子ビットの研究開発2022

    • Author(s)
      寺井 弘高, 金 鮮美, 猪股 邦宏, 山下 太郎, 布施 智子, 吉原 文樹, アシュハブ サヘル, 仙場 浩一
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Coherence properties of NbN-based superconducting qubits2022

    • Author(s)
      Sunmi Kim, Hirotaka Terai, Taro Yamashita, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab,Kunihiro Inomata, and Kouichi Semba
    • Organizer
      The 15th Asia Pacific Physics Conference (APPC15)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] All-nitride superconducting qubits epitaxially grown on silicon substrate2022

    • Author(s)
      Sunmi Kim, Hirotaka Terai, Taro Yamashita, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kunihiro Inomata, Kouichi Semba
    • Organizer
      Workshop on Innovative Nanoscale Devices and Systems (WINDS) 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NbN-based half-flux-quantum SQUID with hybrid structures of 0- and π-junctions2022

    • Author(s)
      Taro Yamashita, Yuto Takeshita, Masamitsu Tanaka, Duong Pham, Shigeyuki Miyajima, Hirotaka Terai, and Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NbN-based half-flux-quantum circuits with superconductor/insulator/ferromagnet/superconductor junctions2022

    • Author(s)
      Duong Pham, Riku Sugimoto, Kenjiro Oba, Feng Li, Yuto Takeshita, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and characterization of a superconducting flux qubit with a π phase shifter2022

    • Author(s)
      Kunihiro Inomata, Hirotaka Terai, Duong Pham and Taro Yamashita
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication Process for Monolithic Integration of Nitride Superconductor-Based Superconducting Qubit with Single Flux Quantum Control Circuit2022

    • Author(s)
      Shigeyuki Miyajima, Taro Yamashita, Masamitsu Tanaka, Naoki Takeuchi, Kunihiro Inomata, and Hirotaka Terai
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A new material platform with nitride superconductors for superconducting qubits2022

    • Author(s)
      Hirotaka Terai, Sunmi Kim, Qiu Wei, Taro Yamashita, Kunihiro Inomata, Tomoko Fuse, Fumiki Yoshihara, and Koichi Semba
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Power Efficient Half-Flux-Quantum Circuits based on π-π-π SQUIDs Aiming at the Control of Qubit Circuits at 10 mK Stage2022

    • Author(s)
      Feng Li, Duong Pham, Yuto Takeshita, Masayuki Higashi, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of selective access of impulse-driven, multi-bits memory based on 0-π SQUIDs2022

    • Author(s)
      Yuto Takeshita, Hinata Fujisawa, Masayuki Higashi, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of the effect of 0-π SQUIDs for enhancing mutual coupling2022

    • Author(s)
      Masayuki Higashi, Yuto Takeshita, Kento Kato, Hinata Fujisawa, Feng Li, Masamitsu Tanaka, Taro Yamashita, and Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent progress in the development of NbN/PdNi/NbN π junctions for quantum circuits2022

    • Author(s)
      Duong Pham, Kenjiro Oba, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      The 2022 JSPS 146th Committee International Symposium on Superconductor Electronics jointed with SSV2022 and QCCC2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of capacitively shunted NbN-based flux qubits with π phase shifter2022

    • Author(s)
      Duong Pham, Kunihiro Inomata, Hirotaka Terai, Taro Yamashita
    • Organizer
      第28回渦糸物理ワークショップ(28th Vortex Physics Workshop Japan)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 希釈冷凍機下における窒化ニオブジョセフソン接合特性の評価2022

    • Author(s)
      上田伴春,田中雅光,堀裕貴,中山彪之助, 山下太郎, 藤巻朗
    • Organizer
      2022年度秋季低温工学・超電導学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Si(100) 基板上に成長した TiN 薄膜の均一性評価2022

    • Author(s)
      寺井弘高, 猪股邦宏, 小林篤, 藤岡洋, 芳中大樹, 小玉剛史, 菱田有二, 金鮮美, 山下太郎, 布施智子, 吉原文樹, 仙場浩一
    • Organizer
      第83回応用物理学会秋季学術講演会
    • 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] 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
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Cryogenic RF components for SC qubit characterization2022

    • Author(s)
      Kunihiro Inomata
    • Organizer
      RIKEN-NICT-East Asia Receiver Joint Workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 量子ビット評価のための極低温マイクロ波コンポーネント2022

    • Author(s)
      猪股邦宏
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
    • 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
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Optimization of half flux quantum circuits composed of π-shift and conventional Josephson junctions2022

    • Author(s)
      Shoma Tanemura, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      Applied Superconductivity Conference 2022 (ASC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of non-destructive readout of impulse-driven memory cell based on 0-π squids2022

    • Author(s)
      Hinata Fujisawa, Yuto Takeshita, Masayuki Higashi, Feng Li, Masamitsu Tanaka, Akira Fujimaki
    • Organizer
      The 2022 JSPS 146th Committee International Symposium on Superconductor Electronics jointed with SSV2022 and QCCC2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of single-π-junction SQUIDs acting as a giant inductance2022

    • Author(s)
      Masayuki Higashi, Feng Li, Yuto Takeshita, Masamitsu Tanaka, Akira Fujimaki
    • Organizer
      The 2022 JSPS 146th Committee International Symposium on Superconductor Electronics jointed with SSV2022 and QCCC2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of writing operation of 0-π-SQUID-based memory cells using only impulse-shaped voltage pulses2022

    • Author(s)
      Yuto Takeshita, Hinata Fujisawa, Masayuki Higashi, Feng Li, Masamitsu Tanaka, Akira Fujimaki
    • Organizer
      The 2022 JSPS 146th Committee International Symposium on Superconductor Electronics jointed with SSV2022 and QCCC2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [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)
      種村匠真, 竹下雄登, 李峰, 田中雅光, 藤巻朗
    • Organizer
      電子情報通信学会ソサイエティ大会
    • 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] NbNベース半磁束量子回路によるトグルフリップフロップ回路の設計と作製2022

    • Author(s)
      杉本理駆、大場絢次郎、Pham Duong、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] 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2022

    • Author(s)
      中山虎之助、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] 半磁束量子回路の回路パラメータ最適化2022

    • Author(s)
      種村匠真、田中雅光、山下太郎、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] 超伝導量子ビット制御に向けた窒化物系超伝導集積回路プロセスの開発2022

    • Author(s)
      宮嶋茂之、山下太郎、田中雅光、竹内尚輝、寺井弘高
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [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 Pd89Ni11 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] 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] NbN-based ferromagnetic π-junctions and their application to quantum circuits2021

    • Author(s)
      Taro Yamashita
    • Organizer
      Spintronics XIV
    • 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 junction2021

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      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)
    • 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 Joint Workshop of 14th Superconducting SFQ VLSI Workshop (SSV 2021) and 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 Joint Workshop of 14th Superconducting SFQ VLSI Workshop (SSV 2021) and 3rd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting Quantum Circuits toward Demonstration of Quantum Advantage in Simultaneous Quantum Messages Protocols2021

    • Author(s)
      Taro Yamashita, Pham Duong, Masamitsu Tanaka, Kunihiro Inomata, Harumichi Nishimura
    • Organizer
      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)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Calculation of the energy band diagram for NbN based superconducting flux qubit2021

    • Author(s)
      K. Inomata, H. Terai, and T. Yamashita
    • Organizer
      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)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting qubit based on nitride superconductor and its monolithic integration with SFQ control circuit2021

    • Author(s)
      S. Miyajima, T. Yamashita, K. Inomata, and H. Terai
    • Organizer
      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)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] All-nitride superconducting qubit on silicon substrate2021

    • Author(s)
      S. Kim, H. Terai, T. Yamashita, W. Qui, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
    • Organizer
      34th International Symposium on Superconductivity (ISS2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhanced Coherence of All-nitride Superconducting Qubit on a Silicon Substrate2021

    • Author(s)
      S. Kim, H. Terai, T. Yamashita, W. Qui, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
    • Organizer
      International Symposium on Novel maTerials and quantum Technologies (ISNTT2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting qubits with nitride Josephson junctions2021

    • Author(s)
      S. Kim, H. Terai, T. Yamashita, W. Qui, T. Fuse, F. Yoshihara, S. Ashhab, K. Inomata, K. Semba
    • Organizer
      8th RIKEN Quantum Computing (RQC) Seminar
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Low-Energy, Low-Current Adiabatic Quantum-Flux-Parametron Circuits for Sub-Kelvin Operation2021

    • Author(s)
      N. Takeuchi, T. Yamae, M. Naruse, and N. Yoshikawa
    • Organizer
      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)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] インパルス駆動型マルチビットメモリの作製と実証2021

    • Author(s)
      竹下雄登、藤澤日向、加藤健人、東正志、李峰、田中雅光、山下太郎、藤巻朗
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] インパルス信号による超伝導マトリクスメモリの内部状態の読み出し2021

    • Author(s)
      加藤健人、竹下雄登、藤澤日向、東正志、李峰、田中雅光、山下太郎、藤巻朗
    • 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、藤澤日向、加藤健人、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] 磁性ジョセフソン接合を用いたインパルス駆動型超伝導メモリセルの動作実証2021

    • Author(s)
      藤澤日向、竹下雄登、加藤健人、東正志、李峰、田中雅光、山下太郎、藤巻朗
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 量子ビット応用に向けた絶縁層を含む強磁性ジョセフソン接合の開発2021

    • Author(s)
      大場絢次郎、杉本理駆、Pham Duong、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] 半磁束量子を利用した小面積Tフリップフロップの解析2021

    • Author(s)
      中村祐介、竹下雄登、東正志、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] 窒化物π接合を用いた磁束型超伝導量子ビットの研究進展2021

    • Author(s)
      山下太郎
    • Organizer
      超伝導エレクトロニクス研究会・東北大学電気通信研究所共同プロジェクト
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] π-phase shift in NbN-based Josephson junctions with weak ferromagnet Pd89Ni11 interlayer2021

    • Author(s)
      Pham Duong, Riku Sugimoto, Kenjiro Oba, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      超伝導エレクトロニクス研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 磁場変調周期が半磁束量子となるSQUIDの評価2021

    • Author(s)
      竹下雄登、東正志、李峰、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] 超伝導位相制御素子の量子回路応用2021

    • Author(s)
      山下太郎
    • Organizer
      第1回超伝導真空領域推進研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 超伝導量子ビットの基礎2021

    • Author(s)
      猪股邦宏
    • Organizer
      第24回ASCOTセミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] NbN-based Josephson junction with PdNi-ferromagnetic barrier2021

    • Author(s)
      Duong Pham, Riku Sugimoto, Hayate Nakamura, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      American Physical Society (APS) March meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Capacitively shunted flux qubit based on epitaxially grown NbN/AlN/NbN Josephson junctions on Si substrate2021

    • Author(s)
      Sunmi Kim, Hirotaka Terai, Taro. Yamashita, Wei Qiu, Tomoko Fuse, Fumiki Yoshihara, Kunihiro Inomata, Kouichi Semba
    • Organizer
      American Physical Society (APS) March meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flux-driven impedance-matched Josephson parametric amplifier with improved pump2021

    • Author(s)
      Yoshiro Urade, Kun Zuo, Syotaro Baba, C. W. Sandbo Chang, Koh-ichi Nittoh, Kunihiro Inomata, Zhirong Lin, Tsuyoshi Yamamoto, Yasunobu Nakamura
    • Organizer
      American Physical Society (APS) March meeting
    • Related Report
      2020 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] 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] NbN/PdNi/NbN 接合におけるジョセフソン臨界電流の強磁性膜厚依存性2021

    • Author(s)
      杉本理駆, Pham Duong, 中村颯, 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] 超伝導回路を用いた量子誤り訂正向けオンライン復号器の提案2021

    • Author(s)
      上野洋典, 近藤正章, 田中雅光, 鈴木泰成, 田渕豊
    • Organizer
      情報処理学会第2回量子ソフトウェア研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] インピーダンス整合型広帯域ジョセフソンパラメトリック増幅器のポンプ電力効率化2021

    • Author(s)
      浦出芳郎, Kun Zuo, 馬場正太郎, C. W. Sandbo Chang, 日塔光一, 猪股邦宏, Zhirong Lin, 山本剛, 中村泰信
    • 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
      2020 Annual Research Report
  • [Presentation] マイクロ波光子を介した個体量子ビットの量子インターコネクション2020

    • Author(s)
      猪股邦宏
    • Organizer
      応用物理学会量子情報光学研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 断熱磁束量子パラメトロン -様々な情報システムへの応用と今後の展望-2020

    • Author(s)
      竹内尚輝
    • Organizer
      日本学術振興会超伝導エレクトロニクス第146委員会・合同分科会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 50-GHz Datapath for Parallel SFQ Microprocessors Based on Gate-Level-Pipeline Architecture2020

    • Author(s)
      Ryota Kashima, Ikki Nagaoka, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導デバイスを用いた量子計算回路2020

    • Author(s)
      山下太郎
    • Organizer
      電気学会基礎・材料・共通部門大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Phase-shift flux quantum bit with NbN/CuNi/NbN π-junction2020

    • Author(s)
      Taro Yamashita, Kun Zuo, Yoshiro Urade, Wei Qiu, Hirotaka Terai, Akira Fujimaki, Yasunobu Nakamura
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [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
    • Int'l Joint Research
  • [Presentation] Quantum Error Correction with a Superconducting Decoder2020

    • Author(s)
      Yosuke Ueno, Masaaki Kondo, Masamitsu Tanaka, Yasunari Suzuki, Yutaka Tabuchi
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Adiabatic quantum-flux-parametron: ultra-low-power superconductor logic for cryogenic signal processing2020

    • Author(s)
      Naoki Takeuchi, C. L. Ayala, O. Chen, Y. He, Nobuyuki Yoshikawa
    • Organizer
      2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Demonstration of flux-bias-free flux qubit with a ferromagnetic π junction2020

    • Author(s)
      Taro Yamashita, Kun Zuo, Yoshiro Urade, Wei Qiu, Hirotaka Terai, Akira Fujimaki, Yasunobu Nakamura
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Superconducting qubit based on fully epitaxial NbN/AlN/NbN junctions on Si substrate2020

    • Author(s)
      Hirotaka Terai, Wei Qiu, Sunmi Kim, Tomoko Fuse, Fumiki Yoshihara, Taro Yamashita, Kouichi Semba
    • 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, Akira Fujimaki
    • 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, 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 K2020

    • Author(s)
      Masayuki Higashi, Daiki Hasegawa, Yuto Takeshita, Feng Li, Masamitsu Tanaka, Taro Yamashita, 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, 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, Koki Ishida, Masamitsu Tanaka, Kyosuke Sano, Taro Yamashita, Takatsugu Ono, Koji Inoue, 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, Akira Fujimaki
    • Organizer
      2020 Applied Superconductivity Conference (ASC 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単一磁束量子回路による量子計算向け情報処理の可能性2020

    • Author(s)
      田中雅光
    • Organizer
      電気学会「量子コンピュータ周辺回路としての低温デジタル回路活用に関する調査専門委員会」第2回研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] π位相シフターを持つNbNベース超伝導量子ビットの開発2020

    • Author(s)
      金鮮美, 山下太郎, 加藤悠輝, 丘偉, 布施智子, 吉原文樹, 仙場浩一, 藤巻朗, 寺井弘高
    • 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
      2020 Annual Research Report
  • [Presentation] PdNi障壁層を用いたNbNベース強磁性ジョセフソン接合の作製と評価2020

    • Author(s)
      杉本理駆, 中村颯, Pham Duong, 田中雅光, 山下太郎, 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
      2020 Annual Research Report
  • [Presentation] π位相シフターを持つNbNベース超伝導量子ビットの開発2020

    • Author(s)
      金鮮美,山下太郎,寺井弘高,丘偉,布施智子,吉原文樹,仙場浩一
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 半磁束量子回路の実現に向けた基本素子の作製2020

    • Author(s)
      長谷川大輝, 加藤健人, 東正志, 竹下雄登, 李峰, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] π位相シフタに向けたコバルト障壁層をもつ強磁性ジョセフソン接合の作製と評価2020

    • Author(s)
      中村颯, 杉本理駆, Pham Duong, 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] 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] SFQパルス駆動型超伝導メモリ実現に向けたメモリセルの静特性評価2020

    • Author(s)
      竹下雄登, 李峰, 長谷川大輝, 加藤健人, 田中雅光, 山下太郎, 藤巻朗
    • Organizer
      第81回応用物理学会秋季学術講演会
    • 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] 強磁性π状態による位相制御2020

    • Author(s)
      山下太郎
    • Organizer
      電子・光コヒーレント変換研究会
    • 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 (SSV 2020)
    • 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
      American 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
      American Physical Society (APS) March meeting 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)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV2020)
    • 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 (SSV2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication of magnetic Josephson junctions on Nb 4 layer structure for large scale 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 (SSV2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Energy consumption of half flux quantum circuits using π-shifted Josephson junctions2020

    • Author(s)
      Feng Li, Yuto Takeshita, Daiki Hasegawa, Kyosuke Sano, Masamitsu Tanaka, Taro Yamashita, Akira Fujimaki
    • Organizer
      32nd International Symposium on Superconductivity (ISS 2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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] Impedance-matched Josephson parametric amplifier using open stubs as shunt capacitance2020

    • Author(s)
      Y. Urade, K. Zuo, K. Inomata, Z.R. Lin, T. Yamamoto, and Y. Nakamura
    • Organizer
      APS March meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Adiabatic Quantum-Flux-Parametron: Recent Progress and Applications2020

    • Author(s)
      N. Takeuchi, C. L. Ayala, O. Chen, Y. He, and N. Yoshikawa
    • Organizer
      13th Superconducting SFQ VLSI Workshop (SSV2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Superconducting quantum circuit with ferromagnetic Josephson junctions2019

    • Author(s)
      Taro Yamashita
    • Organizer
      応用物理学会量子情報グループ研究会
    • Related Report
      2019 Annual Research Report
    • 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 (EASSE 2019)
    • 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 (ISEC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [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
    • Int'l Joint Research
  • [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
    • Int'l Joint Research
  • [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 (QCCC 2019)
    • 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 (QCCC 2019)
    • 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 (EUCAS 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [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
      Superconducting Quantum Devices 2019 (SQD19)
    • 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 (ISEC2019)
    • 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 (ISEC2019)
    • 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 (SQ20th)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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 (SQ20th)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超伝導量子ビットに向けたNbN/AlN/CuNi/NbN強磁性ジョセフソン接合の作製2019

    • Author(s)
      加藤悠輝, 中村颯, 田中雅光, 山下太郎, 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
      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,Ziqiao Ao,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] 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] Single Microwave-Photon Detector based on Dressed State Engineering2019

    • Author(s)
      K. Inomata
    • Organizer
      2019 IEEE MTT-S International Wireless Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Real-time detection of an itinerant microwave photon using dressed-state engineering2019

    • Author(s)
      Z.R. Lin, S. Masuda, K. Inomata, K. Koshino, T. Yamamoto, and Y. Nakamura
    • Organizer
      20th Anniversary of Superconducting Qubits (SQ20th)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of broadband flux-driven Josephson parametric amplifiers based on external impedance engineering2019

    • Author(s)
      Y. Urade, K. Zuo, K. Inomata, T. Yamamoto, and Y. Nakamura
    • Organizer
      20th Anniversary of Superconducting Qubits (SQ20th)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Broadband Josephson parametric amplifier for multiplexed readout of superconducting qubitsw2019

    • Author(s)
      Y. Urade, K. Zuo, K. Inomata, Z.R. Lin, T. Yamamoto, and Y. Nakamura
    • Organizer
      Topical Conference on Quantum Computing 2019 (TCQC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Adiabatic quantum-flux-parametron: recent progress and possibility for quantum applications2019

    • Author(s)
      N. Takeuchi, C. L. Ayala, O. Chen, Y. He, and N. Yoshikawa
    • Organizer
      1st workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 山下研究室ホームページ

    • URL

      https://super.apph.tohoku.ac.jp/

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
  • [Remarks] 研究室ホームページ(研究代表者、名古屋大学)

    • URL

      http://www.super.nuee.nagoya-u.ac.jp/

    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 超伝導量子回路用素子及び超伝導量子計算機2023

    • Inventor(s)
      山下太郎、内田徳之新
    • Industrial Property Rights Holder
      山下太郎、内田徳之新
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-019627
    • Filing Date
      2023
    • Related Report
      2022 Annual Research Report
  • [Funded Workshop] Joint workshop of QCCC2023, SSV2023, and IWSQMD20232023

    • Related Report
      2023 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] 2nd Workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2020)2020

    • Related Report
      2020 Annual Research Report
  • [Funded Workshop] 1st workshop on Quantum and Classical Cryogenic Devices, Circuits, and Systems (QCCC 2019), 名古屋大学, 2019年11月12-13日2019

    • Related Report
      2019 Annual Research Report

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Published: 2019-06-27   Modified: 2025-02-04  

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