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Transformation of quantum symmetries based on asymptotic analysis in tensor categories

Research Project

Project/Area Number 19K03539
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12010:Basic analysis-related
Research InstitutionNagoya University

Principal Investigator

Yamagami Shigeru  名古屋大学, 多元数理科学研究科, 名誉教授 (90175654)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsfree quantum state / hypergroup / radial representation / semicircular law / Plancherel formula / primitive ideal / Stieltjes transform / state functional / Daniell integral / gaussian element / moment problem / tensor category / dequantization
Outline of Research at the Start

従来、対称性の研究は、群が幾何学的空間に作用する場合を中心に行われてきた。物理的な状況において、これは時空の存在を前提として論を組み立てることに他ならない。
ここでは、発想を逆転させて、まず量子対称性の実体としてのテンソル圏から出発し、それに基づく多自由度系の極限を考え、極限を統制するマクロパラメータとして幾何学的情報を抽出する。
いわば、テンソル圏による対称性および保存則に着目した形で、非可換な量子系から可換な系を導くという、量子化ならぬ反量子化のあるべき姿の探求を目標とする。

Outline of Final Research Achievements

We have investigated a variety of basic questions on transformation phenomena in quantum symmetries.Among them, the following topics are covered with results. Under the scaling transformation, asymptotic behaviours of free states
is described as approaching ground states.States of geometric series on a polynomial hypergroup is investigated and their spectrum analysis is worked out explicitly.As an application, Plancherel type decomposition is established for radial representations of free groups. Moreover the result is interpreted in terms of continued fractions and we have found that it exhibits a perturbation from the semicircular law.
In view of the role of radial representations in spectral decompositions, we focused on the description of the C*-algebra of radial representations and found that its primitive ideal space as well as its topology was captured in a concrete way.

Academic Significance and Societal Importance of the Research Achievements

スケール変換の下での自由状態の極限移行の形態は量子状態の漸近解析の手がかりを与えるものである。また、超群上の状態のスペクトル解析とその連分数展開による特徴づけは、量子確率論における新たな方向性を示唆している。非可換積分の基礎となる線型汎関数に伴う表現の記述は、従来敬遠されがちであった、その方面への初等的なアプローチを可能にするものと期待される。
自由群の放射表現に伴う作用素環の原始イデアル空間の記述は、非分離的位相の中でも従来の群表現によるものと対照的な構造を有するもので、その記述の簡明さと相まって、一定の役割を果たすものと思われる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2020 2019 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Book (2 results) Remarks (2 results)

  • [Journal Article] Scaling flow on covariance forms of CCR algebras2020

    • Author(s)
      Shigeru Yamagami
    • Journal Title

      Letters in Mathematical Physics

      Volume: 110 Issue: 2 Pages: 371-385

    • DOI

      10.1007/s11005-019-01221-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Spectral analysis of analytic functionals on certain polynomial hypergroups2023

    • Author(s)
      Yamagami Shigeru
    • Organizer
      RIMS meeting, Recent developments in operator algebras
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Continued fractions of shifted semicircular roots2023

    • Author(s)
      Yamagami Shigeru
    • Organizer
      Non-Commutative Probability and Related Topics
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Around von Neumann's projection in Weyl algebra2019

    • Author(s)
      Shigeru Yamagami
    • Organizer
      Functional Analysis and Operator Algebra Seminar between JAPAN and INDONESIA
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 数学のとびら ルベーグ積分と測度2022

    • Author(s)
      山上 滋
    • Total Pages
      296
    • Publisher
      裳華房
    • ISBN
      9784785312091
    • Related Report
      2021 Research-status Report
  • [Book] 量子解析のための作用素環入門2019

    • Author(s)
      山上 滋
    • Total Pages
      288
    • Publisher
      共立出版
    • ISBN
      9784320114050
    • Related Report
      2019 Research-status Report
  • [Remarks] SSS on Mathematics

    • URL

      https://www.math.nagoya-u.ac.jp/~yamagami/

    • Related Report
      2023 Annual Research Report
  • [Remarks] SSS on Mathematics

    • URL

      http://www.math.nagoya-u.ac.jp/~yamagami/

    • Related Report
      2022 Research-status Report 2021 Research-status Report 2020 Research-status Report 2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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