• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Application of variable boundary condition in waveguide quantum electrodynamics

Research Project

Project/Area Number 19K03684
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Koshino Kazuki  東京医科歯科大学, 教養部, 准教授 (90332311)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords導波路QED / 超伝導量子計算 / 量子光学 / 量子制御 / 量子エレクトロニクス / 応用光学・量子光工学 / 量子コンピュータ
Outline of Research at the Start

超伝導人工原子とマイクロ波との結合系である回路量子電気力学系では,導波路端での境界条件を連続的かつ高速にその場制御することができる.これは,原子からマクロに離れた電流によって,原子と導波路との結合のオンオフを遠隔操作する可能性に繋がる.本研究では,量子光学理論の立場から,導波路端での可変境界条件を活用した新たな量子現象を模索し,量子デバイス(長寿命量子ビット・単一光子源・マイクロ波光学素子など)への応用を図る.

Outline of Final Research Achievements

When we apply a resonant light to an atom through a waveguide, the atom completely reflects the light if the light intensity is weak. In contrast, the atom completely transmits the light if the light intensity is strong. In other words, an atom changes the boundary condition of a waveguide depending on the intensity of the applied field. Using this property, we proposed a Josephson quantum filter, which resolves the tradeoff between the gate speed and the qubit lifetime, which is universal in superconducting quantum computation.

Academic Significance and Societal Importance of the Research Achievements

集積化された固体量子ビットを用いて量子計算を遂行するためには,個別アクセスのために個々の量子ビットに導波路を結合させ,そこから制御パルスを照射する.ゲート時間を短くするためには量子ビット―導波路結合は強いほうが良いが,量子ビットの寿命を長くするためには量子ビットの導波路への輻射緩和を防ぐ必要があり結合は弱いほうが良い.このように,ゲート時間と量子ビット寿命にはトレードオフの関係がある.本研究で提案したジョセフソン量子フィルタはこのトレードオフを解消するものであり,超伝導量子計算の実現可能性を拡げるものである.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (39 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (7 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (25 results) (of which Int'l Joint Research: 19 results,  Invited: 2 results) Book (1 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] University of Arkansas(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Arkansas(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Arkansas(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Deterministic three-photon down-conversion by a passive ultrastrong cavity-QED system2022

    • Author(s)
      Koshino Kazuki、Shitara Tomohiro、Ao Ziqiao、Semba Kouichi
    • Journal Title

      Physical Review Research

      Volume: 4 Issue: 1

    • DOI

      10.1103/physrevresearch.4.013013

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elliptical rotation of a bosonic oscillator in ultrastrong waveguide QED2021

    • Author(s)
      Koshino Kazuki
    • Journal Title

      Physical Review Research

      Volume: 3 Issue: 2

    • DOI

      10.1103/physrevresearch.3.023060

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nonclassicality of open circuit QED systems in the deep-strong coupling regime2021

    • Author(s)
      Shitara Tomohiro、Bamba Motoaki、Yoshihara Fumiki、Fuse Tomoko、Ashhab Sahel、Semba Kouichi、Koshino Kazuki
    • Journal Title

      New Journal of Physics

      Volume: 23 Issue: 10 Pages: 103009-103009

    • DOI

      10.1088/1367-2630/ac2850

    • NAID

      120007183778

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effects of higher levels of qubits on control of qubit protected by a Josephson quantum filter2021

    • Author(s)
      Masuda Shumpei、Koshino Kazuki
    • Journal Title

      New Journal of Physics

      Volume: 23 Issue: 1 Pages: 013006-013006

    • DOI

      10.1088/1367-2630/abd809

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] On-demand generation and characterization of a microwave time-bin qubit2020

    • Author(s)
      Ilves J.、Kono S.、Sunada Y.、Yamazaki S.、Kim M.、Koshino K.、Nakamura Y.
    • Journal Title

      npj Quantum Information

      Volume: 6 Issue: 1

    • DOI

      10.1038/s41534-020-0266-4

    • NAID

      130008157562

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Breaking the trade-off between fast control and long lifetime of a superconducting qubit2020

    • Author(s)
      Kono S.、Koshino K.、Lachance-Quirion D.、van Loo A. F.、Tabuchi Y.、Noguchi A.、Nakamura Y.
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 3683-3683

    • DOI

      10.1038/s41467-020-17511-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Protection of a Qubit via Subradiance: A Josephson Quantum Filter2020

    • Author(s)
      Koshino Kazuki、Kono Shingo、Nakamura Yasunobu
    • Journal Title

      Physical Review Applied

      Volume: 13 Issue: 1

    • DOI

      10.1103/physrevapplied.13.014051

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 共振器・導波路QEDと量子デバイスへの応用2021

    • Author(s)
      越野和樹
    • Organizer
      第9回つくば量子情報サロン
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 超強結合共振器QED系を用いた決定論的三光子下方変換2021

    • Author(s)
      越野和樹, 仙場浩一
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超強結合導波路QED系における調和振動子の楕円運動2021

    • Author(s)
      越野和樹
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Saturable Purcell Filter for Circuit QED2021

    • Author(s)
      I. Iakoupov, K. Koshino
    • Organizer
      ISNTT2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stimulated Emission of Superradiant Atoms in Waveguide QED2021

    • Author(s)
      R. Asaoka, Y. Tokunaga, J. Gea-Banacloche, K. Koshino
    • Organizer
      ISNTT2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Parameter Analysis Towards Deterministic Photon Down-conversion in Ultra-strong Coupling Regime2021

    • Author(s)
      Z. Ao, F. Yoshihara, T. Fuse, T. Aoki, K. Koshino, K. Semba
    • Organizer
      ISNTT2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Gauge-sensitive Selection Rule in the Ultrastrong Coupling Regime2021

    • Author(s)
      T. Shitara, K. Koshino
    • Organizer
      ISNTT2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Saturable Purcell filter for circuit QED2021

    • Author(s)
      I. Iakoupov, K. Koshino
    • Organizer
      APS March Meeting 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Constructing resource theories of nonclassicality for continuous- and discrete-variable hybrid systems2021

    • Author(s)
      T. Shitara, K. Koshino
    • Organizer
      APS March Meeting 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theory of deterministic three-photon down-conversion in ultrastrong cavity QED2020

    • Author(s)
      Kazuki Koshino and Kouichi Semba
    • Organizer
      APS March Meeting 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spectroscopic Observation of Crossover from Classical Duffing Oscillator to Kerr Parametric Oscillator2020

    • Author(s)
      T. Yamaji, S. Kagami, A. Yamaguchi, T. Satoh, K. Koshino, H. Goto, Z. Lin, Y. Nakamura, T. Yamamoto
    • Organizer
      APS March Meeting 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ground state of open circuit QED systems in the deep-strong coupling regime2020

    • Author(s)
      T. Shitara, M. Bamba, F. Yoshihara, T. Fuse, S. Ashhab, K. Semba, K. Koshino
    • Organizer
      APS March Meeting 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 共振器QEDと量子デバイスへの応用2020

    • Author(s)
      越野和樹
    • Organizer
      Q-LEAP量子コンピュータセミナー~ハードウェア研究開発入門~
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Generation of a microwave time-bin qubit with a superconducting qubit2019

    • Author(s)
      Jesper Ilves, Shingo Kono, Yoshiki Sunada, Shota Yamazaki, Minkyu Kim, Kazuki Koshino, Yasunobu Nakamura
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Real-time detection of an itinerant microwave photon using dressed-state engineering2019

    • Author(s)
      Zhirong Lin, Shumpei Masuda, Kunihiro Inomata, Kazuki Koshino, Tsuyoshi Yamamoto, Yasunobu Nakamura
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Breaking the trade-off between gate and relaxation times of a superconducting qubit with a Josephson quantum filter: Experiment2019

    • Author(s)
      S. Kono, K. Koshino, Y. Tabuchi, A. Noguchi, D. Lachance-Quirion, and Y. Nakamura
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theory of Josephson Quantum Filter2019

    • Author(s)
      Kazuki Koshino, Shingo Kono, Yutaka Tabuchi, Atsushi Noguchi, Dany Lachance-Quirion, Yasunobu Nakamura
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theoretical study of on-chip single microwave photon source based on adiabatic population transfer and shortcuts to adiabaticity2019

    • Author(s)
      Shumpei Masuda and Kazuki Koshino
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ground state of a circuit QED system in the deep-strong coupling regime coupled to an environment2019

    • Author(s)
      Tomohiro Shitara, Motoaki Bamba, Fumiki Yoshihara, Tomoko Fuse, Kouichi Semba, Kazuki Koshino
    • Organizer
      SQ20th
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] キャビティQEDに基づく受動的光子間ゲートの最適化2019

    • Author(s)
      浅岡類, 徳永裕己, 金本理奈, 後藤隼人, 越野和樹, 青木隆朗
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ジョセフソン量子フィルタの理論2019

    • Author(s)
      越野和樹, 河野信吾, 田渕豊, 野口篤史,D. Lachance-Quirion, 中村泰信
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 超伝導回路を用いたマイクロ波タイムビン量子ビットの決定論的な生成と検証2019

    • Author(s)
      Jesper Ilves, 河野信吾, 砂田佳希, 山崎翔太, Minkyu Kim, 越野和樹, 中村泰信
    • Organizer
      日本物理学会 第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Selection Rules of Quantum Transitions Observed in Superconducting Flux Qubit-resonator Circuits in the Ultra-strong Coupling Regime2019

    • Author(s)
      Z. Ao, F. Yoshihara, T. Fuse, S. Kim, S. Ashhab, K. Kakuyanagi, S. Saito, T. Shitara, K. Koshino, T. Aoki, K. Semba
    • Organizer
      ISNTT 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theoretical Study of a Cubic Transmon-transmon Coupled System2019

    • Author(s)
      S. Masuda, A. Noguchi, H. Takahashi, K. Koshino, Y. Nakamura
    • Organizer
      ISNTT 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variational Analysis of the Ground State of a Circuit QED System in the Deep-strong Coupling Regime Coupled to an Environment2019

    • Author(s)
      T, Shitara, M. Bamba, F. Yoshihara, T. Fuse, K. Semba, K. Koshino
    • Organizer
      ISNTT 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] 共振器量子電磁力学2020

    • Author(s)
      越野 和樹
    • Total Pages
      200
    • Publisher
      サイエンス社
    • ISBN
      9784781914879
    • Related Report
      2020 Research-status Report
  • [Remarks] 反超放射で量子ビットを守る―量子ビット寿命の原理的限界を打破―

    • URL

      http://www.tmd.ac.jp/archive-tmdu/kouhou/20200128_2.pdf

    • Related Report
      2019 Research-status Report
  • [Remarks] A filter for cleaner qubits

    • URL

      https://www.eurekalert.org/pub_releases/2020-03/tmad-aff030520.php

    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 非線形フィルタ2019

    • Inventor(s)
      中村泰信,河野信吾,越野和樹
    • Industrial Property Rights Holder
      中村泰信,河野信吾,越野和樹
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi