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Exploring novel information geometrical structures in classical/quantum statistical systems

Research Project

Project/Area Number 17H02861
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionOsaka University

Principal Investigator

Fujiwara Akio  大阪大学, 大学院理学研究科, 教授 (30251359)

Co-Investigator(Kenkyū-buntansha) 佐藤 譲  北海道大学, 電子科学研究所, 准教授 (30342794)
杉田 洋  大阪大学, 大学院理学研究科, 教授 (50192125)
長岡 浩司  電気通信大学, 大学院情報理工学研究科, 名誉教授 (80192235)
山形 浩一  国立情報学研究所, 情報学プリンシプル研究系, 特任准教授 (30743520)
Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywords情報幾何学 / 統計多様体 / 局所漸近正規性 / ランダム力学系 / 非可換Lebesgue分解 / 量子トモグラフィ / Chentsovの定理 / 機械学習
Outline of Final Research Achievements

Aiming at exploring novel information geometrical structures in classical/quantum information systems, we studied the following: 1) Theory of quantum local asymptotic normality, 2) Extensions of Chentsov's theorem, 3) Dually flattenable structures of monotone quantum metrics, 4) Information geometry of randomized quantum tomography, 5) Noise induced plateau phenomena in on-line machine learning, 6) Experimental demonstration of adaptive quantum state estimation theory.

Academic Significance and Societal Importance of the Research Achievements

確率分布の集まりが内包する自然な微分幾何構造の研究に端を発する情報幾何学は,1980年代前半に基本的枠組みが提唱されて以来,様々な分野で輝かしい応用展開がなされてきたが,その理論体系自体は未だ発展途上である.本研究では,量子統計的漸近理論やランダム力学系など,従来の情報幾何学では扱われなかった新規な研究テーマに挑戦し,いくつかの方向性において情報幾何学を実質的に深化させることができた.

Report

(6 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (9 results)

All 2022 2020 2018 2017

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Hommage to Chentsov’s theorem2022

    • Author(s)
      Fujiwara Akio
    • Journal Title

      Information Geometry

      Volume: - Issue: S1 Pages: 79-98

    • DOI

      10.1007/s41884-022-00077-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Noncommutative Lebesgue decomposition and contiguity with applications in quantum statistics2020

    • Author(s)
      Fujiwara Akio、Yamagata Koichi
    • Journal Title

      Bernoulli

      Volume: 26 Issue: 3 Pages: 2105-2142

    • DOI

      10.3150/19-bej1185

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adaptive quantum state estimation for dynamic quantum state2020

    • Author(s)
      S. Nohara, R. Okamoto, A. Fujiwara, and S. Takeuchi
    • Journal Title

      Physical Review A

      Volume: 102 Issue: 3

    • DOI

      10.1103/physreva.102.030401

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dually flat structures induced from monotone metrics on a two-level quantum state space2020

    • Author(s)
      Fujiwara Akio
    • Journal Title

      The European Physical Journal Plus

      Volume: 135 Issue: 10 Pages: 860-860

    • DOI

      10.1140/epjp/s13360-020-00877-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Information Geometry of Randomized Quantum State Tomography2018

    • Author(s)
      Akio Fujiwara and Koichi Yamagata
    • Journal Title

      Entropy

      Volume: 20 Issue: 8 Pages: 609-609

    • DOI

      10.3390/e20080609

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complementing Chentsov's characterization2018

    • Author(s)
      Akio Fujiwara
    • Journal Title

      Springer Proceedings in Mathematics & Statistics

      Volume: 252 Pages: 335-347

    • DOI

      10.1007/978-3-319-97798-0_13

    • ISBN
      9783319977973, 9783319977980
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental demonstration of adaptive quantum state estimation for single photonic qubits2017

    • Author(s)
      Okamoto Ryo、Oyama Satoshi、Yamagata Koichi、Fujiwara Akio、Takeuchi Shigeki
    • Journal Title

      Physical Review A

      Volume: 96 Issue: 2 Pages: 022124-022124

    • DOI

      10.1103/physreva.96.022124

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Information geometry of randomized qubit state tomography2018

    • Author(s)
      Akio Fujiwara
    • Organizer
      Entropy 2018: From Physics to Information Science and Geometry
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 情報幾何学:古典から量子へ2017

    • Author(s)
      藤原彰夫
    • Organizer
      幾何学シンポジウム
    • Related Report
      2017 Annual Research Report
    • Invited

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Published: 2017-04-28   Modified: 2024-01-30  

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