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Development of Quantum Measurement Optimization Theory based on Bayesian Statistics

Research Project

Project/Area Number 16K13775
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionOsaka University

Principal Investigator

Tanaka Fuyuhiko  大阪大学, 基礎工学研究科, 准教授 (90456161)

Research Collaborator SUGIYAMA Takanori  
IMORI Shinpei  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsベイズ統計 / 統計的決定理論 / 量子情報 / モンテカルロ法 / 量子計算機 / ゲートセットトモグラフィ / 量子トモグラフィ / 漸近理論 / 決定理論 / 量子決定理論 / 統計数学 / ハイパフォーマンス・コンピューティング / 量子コンピュータ
Outline of Final Research Achievements

The ultimate goal of our research is to propose a systematic and universal methodology to obtain the best measurement given a specific quantum estimation problem. As a first step, we reconsider the mathematical framework of quantum statistical decision theory and extend it such that we propose a better class of measurements for finite sample cases and justify it by using the approximation method (asymptotic theory). In toy example, according to our proposed methodology we find the measurement yielding smaller estimation error than traditional one. It can be easily implemented in an actual quantum experiment.
As for practical application, we have to consider numerical methods and regularizations in the current level of quantum experiments. We show the (mathematical) consistency of a class of regularized estimators in the context of self-consistent quantum tomography.

Academic Significance and Societal Importance of the Research Achievements

例えば、非可換な2つのobservable (X, Y)の期待値を実験的にデータから推定することを考える。量子力学の教科書的には、X,Yの2種類の射影測定をN/2回ずつ行うことが自然であり、誰も疑わずに使っている。量子推定の既存研究は原理的な推定誤差の下限を達成する方法を与えているが、理想的な条件下の話であり技術的な難易度が高い。しかし、本研究成果を利用すれば4種類の射影測定でN/4回ずつ測定して、一様に推定誤差を減らせることがわかる。
このように、本研究の成果が適用できれば、現在の実験現場で理想的な条件でなくとも、無理せず推定誤差を減らす方法が提案できる。

Report

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

    (12 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Open Access: 1 results,  Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] 量子統計的決定理論の最近の進展2018

    • Author(s)
      田中冬彦 山形浩一
    • Journal Title

      応用数理

      Volume: 印刷中

    • NAID

      130007491223

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] 量子統計的決定理論に基いた射影測定の選択2017

    • Author(s)
      田中冬彦
    • Journal Title

      数理解析研究所講究録

      Volume: 2059 Pages: 39-77

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] Quantum statistical decision theory with a restricted class of measurements2017

    • Author(s)
      Fuyuhiko Tanaka
    • Journal Title

      数理解析研究所講究録

      Volume: 2018 Pages: 45-67

    • Related Report
      2016 Research-status Report
    • Acknowledgement Compliant
  • [Presentation] Reliable characterization for improving and validating accurate elementary quantum operations2019

    • Author(s)
      SUGIYAMA Takanori, IMORI Shinpei, and TANAKA Fuyuhiko
    • Organizer
      APS March meeting
    • Related Report
      2018 Annual Research Report
  • [Presentation] 統計研究者のための量子トモグラフィ入門2018

    • Author(s)
      田中冬彦
    • Organizer
      RIMS研究集会 " 高次元量子雑音の統計モデリング"
    • Related Report
      2018 Annual Research Report
  • [Presentation] Twirling Projective Measurements in Quantum Estimation2018

    • Author(s)
      Fuyuhiko Tanaka
    • Organizer
      APS March meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Self-consistent quantum tomography for characterizing super-accurate quantum operations2018

    • Author(s)
      SUGIYAMA Takanori, IMORI Shinpei, and TANAKA Fuyuhiko
    • Organizer
      APS March meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Self-consistent quantum tomography for reliably characterizing super-accurate quantum operations2018

    • Author(s)
      SUGIYAMA Takanori, IMORI Shinpei, TANAKA Fuyuhiko
    • Organizer
      Aspen Winter Conference on Advances in Quantum Algorithms and Computation
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 量子統計的決定理論における量子測定の漸近的許容性2017

    • Author(s)
      田中冬彦
    • Organizer
      2017年度統計関連学会連合大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 量子系で役立つ統計学を創る2017

    • Author(s)
      田中冬彦
    • Organizer
      数学と諸分野の連携を通した知の創造
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 量子統計的決定理論に基いた射影測定の選択2016

    • Author(s)
      田中冬彦
    • Organizer
      RIMS研究集会 "量子システム推定の数理"
    • Place of Presentation
      京都大学数理解析研究所(京都府・京都市)
    • Year and Date
      2016-10-26
    • Related Report
      2016 Research-status Report
  • [Presentation] 量子統計的決定理論の新たなフレームワーク2016

    • Author(s)
      田中冬彦
    • Organizer
      2016年度統計関連学会連合大会
    • Place of Presentation
      金沢大学角間キャンパス(石川県・金沢市)
    • Year and Date
      2016-09-05
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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