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Scaling limits for one-dimensional large scale interacting systems

Research Project

Project/Area Number 21K20332
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0201:Algebra, geometry, analysis, applied mathematics,and related fields
Research InstitutionKeio University

Principal Investigator

Suda Hayate  慶應義塾大学, 理工学研究科(矢上), 研究員 (80912386)

Project Period (FY) 2021-08-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Keywords箱玉系 / Box-Ball System / 確率調和振動子鎖 / 大規模相互作用系 / スケール極限 / 一般化流体力学極限 / 逆散乱法 / 離散ソリトン系 / KKR全単射 / 10-elimination / Slot decomposition / エネルギー超拡散
Outline of Research at the Start

大規模相互作用系とは, 巨視的に観測される物理現象を微視的なレベルから解析するために用いられる数理模型の総称である. 本研究では, 確率解析の手法を用いて, 大規模相互作用系から巨視的な時間発展法則を導くことを目的とする. 具体的に取り組む問題は, 一次元非線形系に広く見られる熱の異常輸送現象の数理的手法による解明や, 非平衡統計力学の新しい潮流として注目されている, 一次元可積分系における一般化流体力学極限の厳密証明である.

Outline of Final Research Achievements

(1)We introduce a new linearization method for the box-ball system, called "seat number configuration". This also gives a relationship between several existing linearization methods for the box-ball system. By utilizing the seat number configuration, it is expected that the space-time scaling limits for box-ball systems in more general situations will become possible, and partial results have already obtained.
(2)We consider the behavior of macroscopic heat diffusion for stochastic harmonic chains, where a new tyoe of boundary condition is imposed at the origin. Although there was a delay in starting the research due to the pandemic and it was not completed during the term of the grant, it is progressing well.

Academic Significance and Societal Importance of the Research Achievements

巨視的な物理現象を微視的な数理模型から厳密に導出することは, 統計力学に動機づけられた重要な問題である. 本研究課題では, 具体的な微視的系に関して, その巨視的振る舞いを導出するために必要な数学的道具の構成, またそれを用いた時空スケール極限の考察が行われた. これは, 統計力学的な問題に数学的基礎づけを与えるものである.
「普遍性」の観点からは, 類似した数学的構造を持つ微視的系に対しても同様の結果が得られることが期待されるため, 本研究成果は関連する研究分野に今後の研究指針を与えるものとしても意味のあるものである.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2024 2023 2022 Other

All Int'l Joint Research (1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 7 results)

  • [Int'l Joint Research] Universite Paris-Dauphine/University Lyon 1(フランス)

    • Related Report
      2023 Annual Research Report
  • [Presentation] 無限粒子系、確率場の諸問題XVIII2024

    • Author(s)
      須田 颯
    • Organizer
      Diffusive fluctuations for the box-ball system
    • Related Report
      2023 Annual Research Report
  • [Presentation] Derivation of fractional diffusion equations from stochastic harmonic chains2023

    • Author(s)
      Hayate Suda
    • Organizer
      Evolution Equations and Related Topics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Diffusive fluctuations for the box-ball system in low density regime2023

    • Author(s)
      Hayate Suda
    • Organizer
      The 21st Symposium Stochastic Analysis on Large Scale Interacting Systems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Derivation of fractional diffusion equations from stochastic harmonic chains2023

    • Author(s)
      須田 颯
    • Organizer
      非線形解析セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Relationships between two linearizations of the box-ball system : rigged configuration and slot decomposition2022

    • Author(s)
      Hayate Suda
    • Organizer
      Workshop on box-ball systems from integrable systems and probabilistic perspectives
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Relationships between two linearizations of the box-ball system : rigged configuration and slot decomposition2022

    • Author(s)
      Hayate Suda
    • Organizer
      Integrability, combinatorics and representation theory, MATRIX/RIMS tandem workshop
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Seat number cofiguration of the box-ball system2022

    • Author(s)
      Hayate Suda
    • Organizer
      Rigorous Statistical Mechanics and Related Topics
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] キャリア容量有限箱玉系に対する一般化流体力学極限2022

    • Author(s)
      Hayate Suda
    • Organizer
      大規模相互作用系の確率解析
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2021-10-22   Modified: 2025-01-30  

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