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Modularization of quantum circuits and mathematical and experimental study of quantum control

Research Project

Project/Area Number 20K03795
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
Research InstitutionKindai University

Principal Investigator

Nakahara Mikio  近畿大学, 理工学総合研究所, 研究員 (90189019)

Co-Investigator(Kenkyū-buntansha) NICCHORMAIC SILE  沖縄科学技術大学院大学, 量子技術のための光・物質相互作用ユニット, 教授 (10715288)
BUSCH Thomas  沖縄科学技術大学院大学, 量子システム研究ユニット, 教授 (30715272)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsデコヒーレンス / 非マルコフ過程 / 非断熱量子制御 / ナノ光ファイバー / 光・物質相互作用 / 近接光 / デコヒーレンス抑制 / 光学ナノファイバー / 近接場 / 4重極相互作用 / 量子状態トモグラフィー / 不確定性関係 / 冷却原子 / 量子ネットワーク / Rydberg原子 / 光ナノファイバー / 機械学習 / 非マルコフ的緩和 / Majorana表示 / 光.物質相互作用 / 量子ゲート / 量子回路 / 量子制御 / サブリーマン測地線 / カルタン分解
Outline of Research at the Start

NISQと言われる量子誤り訂正を必要としない中規模量子コンピュータで意味のある計算をするには.できるだけ短時間で計算を終えなければならない.本研究では中規模量子回路をカルタン分解を用いて少数量子ビットに作用するモジュールに分解する.ハミルトニアンが与えられると,量子系はユニタリ群多様体の上で少数の方向にしかの時間発展できない.この状況での最短経路はサブリーマン測地線で与えられる.カルタン分解で得られた各モジュールはサブリーマン測地線に沿って実装される.これにより,NISQで意味のある量子計算が実行できる可能性が拓かれる

Outline of Final Research Achievements

Nakahara conducted research on the degradation of quantum information in controllable non-Markovian environments and demonstrated it using an NMR quantum computer. As a method to suppress decoherence, he studied non-adiabatic quantum control, which achieves adiabatic control in a short time, and edited a special issue of Philosophical Transactions of the Royal Society that comprehensively summarized non-adiabatic quantum control.
Busch and Nic Chormaic conducted research on the interaction of light and matter and proposed using optical nanofibers as cavities to couple multiple atoms. They studied the transfer of angular momentum from guided light associated with electric quadrupole transitions in the vicinity of a nanofiber to atoms.

Academic Significance and Societal Importance of the Research Achievements

現在のNISQ(Near Term Intermediate Quantum)コンピュータを超える大規模量子コンピュータは,物流,創薬,物質設計,量子AIなど我々の生活に革命的な変革をもたらすと期待されている.その実現に対する障壁の一つにデコヒーレンスがある.本研究ではデコヒーレンスを解析し,それを克服する方法を提案した.分担者は,新たな複雑量子システムの探索とテストによって,量子技術の進化に貢献した.特に量子計測や量子シミュレーションの装置の改善に活用が期待される.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (21 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (8 results) (of which Int'l Joint Research: 7 results,  Open Access: 7 results,  Peer Reviewed: 7 results) Presentation (10 results) (of which Int'l Joint Research: 10 results,  Invited: 9 results)

  • [Int'l Joint Research] ITMO University(ロシア連邦)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ITMO University(ロシア連邦)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 上海大学(中国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Direction-dependent coupling between a nanofiber-guided light field and a two-level atom with an electric quadrupole transition2023

    • Author(s)
      Fam Le Kien, Sile Nic Chormaic, and Thomas Busch
    • Journal Title

      Phys Rev A

      Volume: 107 Issue: 1 Pages: 013713-013713

    • DOI

      10.1103/physreva.107.013713

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Preface to ‘Shortcuts to adiabaticity: theoretical, experimental and interdisciplinary perspectives’2022

    • Author(s)
      Nakahara Mikio、Chen Xi、Ban Yue、Masuda Shumpei
    • Journal Title

      Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

      Volume: 380 Issue: 2239 Pages: 202102841-3

    • DOI

      10.1098/rsta.2021.0284

    • Related Report
      2022 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Counterdiabatic formalism of shortcuts to adiabaticity2022

    • Author(s)
      Nakahara Mikio
    • Journal Title

      Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

      Volume: 380 Issue: 2239 Pages: 202102721-21

    • DOI

      10.1098/rsta.2021.0272

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Repulsive Casimir-Polder potentials of low-lying excited states of a multilevel alkali-metal atom near an optical nanofiber2022

    • Author(s)
      Fam Le Kien, D. F. Kornovan, Sile Nic Chormaic, and Thomas Busch
    • Journal Title

      Physical Review A

      Volume: 105 Issue: 4 Pages: 0428171-14

    • DOI

      10.1103/physreva.105.042817

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optical force between two coupled identical parallel optical nanofibers2022

    • Author(s)
      F Le Kien, S Nic Chormaic and T Busch
    • Journal Title

      Phys Rev A

      Volume: 105 Issue: 6 Pages: 063517-063517

    • DOI

      10.1103/physreva.105.063517

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transfer of angular momentum of guided light to an atom with an electric quadrupole transition near an optical nanofiber2022

    • Author(s)
      F Le Kien, S Nic Chormaic and T Busch
    • Journal Title

      Phys Rev A

      Volume: 106 Issue: 1 Pages: 013712-013712

    • DOI

      10.1103/physreva.106.013712

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optical trap for an atom around the midpoint between two coupled identical parallel optical nanofibers2021

    • Author(s)
      Le Kien Fam、Nic Chormaic Sile、Busch Thomas
    • Journal Title

      Physical Review A

      Volume: 103 Issue: 6 Pages: 0631061-10

    • DOI

      10.1103/physreva.103.063106

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Controllable non-Markovianity in phase relaxation2020

    • Author(s)
      Kukita Shingo、Kondo Yasushi、Nakahara Mikio
    • Journal Title

      New Journal of Physics

      Volume: 22 Issue: 10 Pages: 103048-103048

    • DOI

      10.1088/1367-2630/abbfcf

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Probing cold atom interactions via optical nanofibers2023

    • Author(s)
      S Nic Chormaic, A Vylegzhanin, Z Shahrabifarahani, A Raj, A Zaitsev, S Abdrakhmanov, W Li, J L Everett, D Brown
    • Organizer
      SPIE Photonics West
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] From cold atoms to microbead manipulation using ultrathin optical fibres2022

    • Author(s)
      S Nic Chormaic
    • Organizer
      IEEE-Optica IIT Bombay Photonics Student Chapters
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Using optical nanofibres to mediate cold atom interactions2022

    • Author(s)
      S Nic Chormaic
    • Organizer
      DAALI Workshop "Delving into light-matter interactions and their applications"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Using optical nanofibres to mediate cold atom interactions2022

    • Author(s)
      S Nic Chormaic
    • Organizer
      EOSAM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Manipulating and trapping particles from atoms to Janus spheres using optical nanofibres2022

    • Author(s)
      S Nic Chormaic
    • Organizer
      Photon UK
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Optical nanofibre dipole traps and Rydberg atom interactions2022

    • Author(s)
      S Nic Chormaic
    • Organizer
      APPC 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hybrid quantum systems using optical nanofibres integrated with cold rubidium atoms2022

    • Author(s)
      S Nic Chormaic, A Vylegzhanin, Z Shahrabifarahani, A Raj, RK Gupta, D Brown, JL Everett.
    • Organizer
      CLEO Pacific Rim 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Optical fiber-based traps for particle trapping, manipulation and characterization2021

    • Author(s)
      S Nic Chormaic
    • Organizer
      SPIE Optics & Photonics: Optical Trapping and Optical Manipulation XVIII, San Diego, USA
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Using optical fibers for particle trapping and manipulation2021

    • Author(s)
      S Nic Chormaic
    • Organizer
      Optical Manipulation and Structured Light, Yokohama, Japan
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Continuously Controllable Non-Markovianity in Phase Relaxation2021

    • Author(s)
      Mikio Nakahara
    • Organizer
      NCTS Annual Theory Meeting 2021: Quantum Physics, Quantum Information, and Quantum Technologies
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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