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Additive decomposition scheme of quantum search algorithm and its application to parallel search problem

Research Project

Project/Area Number 16K05489
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionKyoto Sangyo University

Principal Investigator

TOYAMA Masafumi  京都産業大学, 総合学術研究所, 科研費研究員 (60180189)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords量子情報 / 量子アルゴリズム / 量子探索 / 数理物理
Outline of Final Research Achievements

The following results were obtained:
(1) On the basis of the phase matching method of the iterative quantum search algorithm of the Grover type, we derived an additive decomposition formulation of the iterative quantum search algorithm. Further, we constructed unitary gates of additive forms that substantially reduce the search load. This achievement is the main result of this research project. We published this result in a journal.
(2) On the basis of the result (1), we constructed an ensemble processing scheme. In this scheme, an additive form of the search state for a k-iterative search is given as an ensemble of phase rotation transformations and single search processes. In this sense, this scheme can be regarded as a kind of a parallel processing scheme. This work is scheduled to be submitted to a journal.

Academic Significance and Societal Importance of the Research Achievements

量子探索問題は、グローバーの量子探索アルゴリズムがその起源であり、今日まで様々な変形版や改良版が提案され、量子計算・情報分野の中心的問題となってきた。本研究成果は、この量子探索問題に対して、新しい数学的な発想に基づき、探索負荷の軽減を実現するアルゴリズムを構築したという学術的意義を持つ。
量子アルゴリズムは、実用的ゲートモデル量子コンピュータが実現して初めてその真価を発揮する。近年、ゲートモデル量子コンピュータ実用機の開発研究が加速している。このような状況で、ショアの素因数分解アルゴリズムとともに、量子探索アルゴリズムが潜在的に持つ社会的インパクトは大きい。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (14 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (5 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Int'l Joint Research] McMaster University/Redeemer University College(カナダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] McMaster University(カナダ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] McMaster University(Canada)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] University of Sao Paulo(Brazil)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] McMaster University(カナダ)

    • Related Report
      2016 Research-status Report
  • [Journal Article] The normalization of wave functions of the continuous spectrum2020

    • Author(s)
      M. Amaku, F.A B. Coutinho and F.M. Toyama
    • Journal Title

      Revista Brasileira de Ensino de Fisica

      Volume: 42

    • DOI

      10.1590/1806-9126-rbef-2019-0099

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Additive composition formulation of the iterative Grover algorithm2019

    • Author(s)
      F.M. Toyama and W. van Dijk
    • Journal Title

      Canadian Journal of Physics

      Volume: 97 Issue: 7 Pages: 777-785

    • DOI

      10.1139/cjp-2018-0452

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Decay of a quasistable quantum system and quantum backflow2019

    • Author(s)
      W. van Dijk and F.M. Toyama
    • Journal Title

      Physical Review A

      Volume: 100 Issue: 5

    • DOI

      10.1103/physreva.100.052101

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Weak-measurement experiments on qubits2019

    • Author(s)
      F.M. Toyama
    • Journal Title

      素粒子論研究・電子版

      Volume: 30 Pages: 78-82

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] On the definition of the time evolution operator for time-independent Hamiltonians in non-relativistic quantum mechanics2017

    • Author(s)
      M. Amaku, F.A.B. Coutinho and F.M. Toyama
    • Journal Title

      American Journal of Physics

      Volume: 85 Pages: 692-697

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the definition of the time evolution operator for time-independent Hamiltonians2017

    • Author(s)
      M. Amaku, F.A.B. Coutinho and F.M. Toyama
    • Journal Title

      American Journal of Physics

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Additive decomposition of iterative quantum search operations and its significance for quantum searches2018

    • Author(s)
      F.M. Toyama and W. van Dijk
    • Organizer
      DLT2018 Satellite Workshop in Kyoto
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 京都産業大学 研究者データベースシステム

    • URL

      https://gyoseki.kyoto-su.ac.jp/ktsuhp/KgApp?kyoinId=ymebgeyeggy

    • Related Report
      2017 Research-status Report
  • [Remarks] 京都産業大学 「研究者データベース」

    • URL

      http://post.kyoto-su.ac.jp/s/w020/w020a050.php?k_cd=K8999896005

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2021-02-19  

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