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Continuous-variable quantum information processing in noise-free high-frequency optical sidebands

Research Project

Project/Area Number 18K14143
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 30020:Optical engineering and photon science-related
Research InstitutionThe University of Tokyo

Principal Investigator

Takeda Shuntaro  東京大学, 大学院工学系研究科(工学部), 准教授 (80737304)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords量子光学 / 量子情報 / 連続量量子情報処理 / スクイーズド光 / 量子論理ゲート / シュレディンガーの猫状態 / 光子引き去り / サイドバンド / 量子トモグラフィー / 量子エレクトロニクス
Outline of Final Research Achievements

Quantum properties of light enable quantum computation and high capacity optical communication. Quantum information processing with continuous amplitude and phase of light has been performed in noisy frequencies due to technical limitations, which limits the accuracy of information processing. In this project, we developed basic technologies to generate, manipulate, and detect non-classical optical quantum states in noiseless high frequency sidebands.

Academic Significance and Societal Importance of the Research Achievements

従来、光の連続的な値を用いた量子情報処理は、ノイズの影響を受けやすく、何ステップも情報を処理するとノイズが蓄積するため、大規模な情報処理は困難であった。本研究成果では、ノイズの影響を受けにくい環境下で情報処理を行う基本技術が確立され、これによって従来よりも高精度な量子情報処理の実現可能性が開かれた。将来的には、より大規模な量子情報処理が展開できるようになり、量子コンピュータや大容量通信といった光量子情報処理の実用化へとつながる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (3 results)

All 2019 2018

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Toward large-scale fault-tolerant universal photonic quantum computing2019

    • Author(s)
      Takeda S.、Furusawa A.
    • Journal Title

      APL Photonics

      Volume: 4 Issue: 6 Pages: 060902-060902

    • DOI

      10.1063/1.5100160

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of a Cat State in an Optical Sideband2018

    • Author(s)
      Serikawa Takahiro、Yoshikawa Jun-ichi、Takeda Shuntaro、Yonezawa Hidehiro、Ralph Timothy C.、Huntington Elanor H.、Furusawa Akira
    • Journal Title

      Physical Review Letters

      Volume: 121 Issue: 14 Pages: 143602-143602

    • DOI

      10.1103/physrevlett.121.143602

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Toward practical photonic quantum computing2019

    • Author(s)
      Shuntaro Takeda
    • Organizer
      4th International Symposium on Research and Education of Computational Science
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

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