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Stochastic bifurcation in low-dimensional spaces

Research Project

Project/Area Number 15F15320
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Mathematical analysis
Research InstitutionHokkaido University

Principal Investigator

佐藤 譲  北海道大学, 電子科学研究所, 准教授 (30342794)

Co-Investigator(Kenkyū-buntansha) DOAN THAI SON  北海道大学, 電子科学研究所, 外国人特別研究員
Project Period (FY) 2015-11-09 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2017: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 2016: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2015: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordsランダム力学系 / 確率分岐 / 確率カオス / Dichotomy spectrum
Outline of Annual Research Achievements

ノイズと決定論的力学の相互作用に伴う雑音誘起現象は非線形物理学では古くから研究されてきた問題です。雑音誘起現象とは、決定論力学系の自然測度が微小ノイズにより大幅に変化し、決定論極限で観測されなかった非線形現象がノイズ存在下で観測されるようになる現象です。よく知られた雑音誘起現象である確率共鳴、ノイズ同期、雑音誘起カオスは、いずれも緩急のついた運動を引き起こす不変多様体や、カオティックサドルといった不変集合と外部ノイズとの相互作用により生じます。とくに決定論的動力学がカオス的、あるいは潜在的にカオス的である場合、非自明な確率分岐現象が生じることが知られています。本研究の目的は非線形ランダム力学系の数値解析法を開発するとともに、ランダムlogistic写像、確率Lorenz系における確率分岐構造を解析し、確率カオスの現象論を構築することにあります。本年度は特にランダムlogistic写像における確率分岐、および確率位相方程式におけるノイズ同期現象を研究しました。本研究費(繰り越し分)に基づいて、2017年4月24日-28日に京都大学において、国際研究会Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applicationsを主催し、佐藤譲とThai Son Doanが参加講演しました。Jeroen Lamb, Martin Rasmussen, Maxi Angel (Imperial College London)、Ale Jan Homburg(University of Amsterdam)らを招聘し、ランダム力学系に関する総合的な共同研究を開始しました。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (39 results)

All 2018 2017 2016 Other

All Int'l Joint Research (10 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results) Presentation (20 results) (of which Int'l Joint Research: 20 results,  Invited: 18 results) Remarks (3 results) Funded Workshop (3 results)

  • [Int'l Joint Research] Imperial College London(英国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] University of Amsterdam(Netherlands)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] VAST(ベトナム)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] CNRS(France)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Imperial College London(英国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] University of Amsterdam(Netherlands)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] VAST(ベトナム)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] Vietnam Academy of Science(ベトナム)

    • Related Report
      2015 Annual Research Report
  • [Int'l Joint Research] CNRS/CEA Saclay(France)

    • Related Report
      2015 Annual Research Report
  • [Int'l Joint Research] Imperial College London/London Mathematical Laboratory/Oxford University(英国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Stochastic chaos in a turbulent swirling flow2017

    • Author(s)
      Davide Faranda, Yuzuru Sato, Brice Saint-Michel, Cecil Wiertel, Vincent Padilla, Berengere Dubrulle, Francois Daviaud
    • Journal Title

      Physical Review Letters

      Volume: 119 Issue: 1 Pages: 014502-014502

    • DOI

      10.1103/physrevlett.119.014502

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A random dynamical systems perspective on stochastic resonance2017

    • Author(s)
      Anna Maria Cherubini, Jeroen S W Lamb, Martin Rasmussen, and Yuzuru Sato
    • Journal Title

      Nonlinearity

      Volume: 30 Issue: 7 Pages: 2835-2853

    • DOI

      10.1088/1361-6544/aa72bd

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The dichotomy spectrum for random dynamical systems and pitchfork bifurcations with additive noise2017

    • Author(s)
      M Callaway, TS Doan, JSW Lamb, M Rasmussen
    • Journal Title

      Annales de lInstitut Henri Poincare, Probabilites et Statistiques

      Volume: 53:4 Issue: 4 Pages: 1548-1574

    • DOI

      10.1214/16-aihp763

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Stochastic chaos in a turbulent swirling flow2018

    • Author(s)
      Yuzuru Sato
    • Organizer
      CIMPA spring school, Vietnam Academy of Science and Technology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Noise-induced bifurcations in a random logistic map2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion and intermittency in random dynamical systems2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On the continuity of Lyapunov exponent in random dynamical systems2017

    • Author(s)
      Thai Son Doan
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Noise-induced bifurcations in a random logistic map2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      SIAM Conference on Applications of Dynamical systems
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stochastic chaos in a turbulent swirling flow2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      RIMS workshop on dynamical systems theory and its applications
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion and intermittency in random dynamical systems2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      ANOCOS
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stochastic chaos in a turbulent swirling flow2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      Lorentz Center Workshop on Random Dynamical Systems,
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Noise-induced bifurcations in a random logistic map2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion and intermittency in random dynamical systems2017

    • Author(s)
      Yuzuru Sato
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On the continuity of Lyapunov exponent in random dynamical systems2017

    • Author(s)
      Thai Son Doan
    • Organizer
      Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Workshop on dynamical systems and computation
    • Place of Presentation
      Kyoto University, Kyoto, Kyoto, Japan
    • Year and Date
      2016-03-24
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On continuity of Lyapunov exponents of random dynamical systems2016

    • Author(s)
      Thai Son Doan
    • Organizer
      Workshop on Theory and Applications of Random and Non-autonomous Dynamical Systems
    • Place of Presentation
      Kyoto University, Kyoto, Kyoto, Japan
    • Year and Date
      2016-03-22
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Workshop on Theory and Applications of Random and Non-autonomous Dynamical Systems
    • Place of Presentation
      Kyoto University, Kyoto, Kyoto, Japan
    • Year and Date
      2016-03-16
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lyapunov exponents of random dynamical systems2016

    • Author(s)
      Thai Son Doan
    • Organizer
      Dynamical systems seminar
    • Place of Presentation
      Hokkaido University, Sapporo,Hokkaido, Japan
    • Year and Date
      2016-01-22
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stochastic bifurcation in random logistic maps2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Applications of statical-mechanics and dynamical systems to climate
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Dynamics Days Latin America and the Caribbean
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      CRITICS Workshop
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Hokkaido-Pisa Summer Institute
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomalous diffusion in random dynamical systems2016

    • Author(s)
      Yuzuru Sato
    • Organizer
      Workshop on Anomalous Dynamics and Weak ergodicity breaking
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] Kyoto Dynamics Days

    • URL

      https://www.math.kyoto-u.ac.jp/~kokubu/program.html

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
  • [Remarks] Yuzuru Sato

    • URL

      http://www.math.sci.hokudai.ac.jp/~ysato/

    • Related Report
      2015 Annual Research Report
  • [Remarks] Workshop on Random Dynamical Systems

    • URL

      http://www.math.sci.hokudai.ac.jp/~ysato/workshop2016rds.html

    • Related Report
      2015 Annual Research Report
  • [Funded Workshop] Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications2017

    • Related Report
      2017 Annual Research Report
  • [Funded Workshop] Kyoto Dynamics Days: Random Dynamical Systems Theory and Its Applications2017

    • Related Report
      2016 Annual Research Report
  • [Funded Workshop] Workshop on Theory and Applications of Random and Non-autonomous Dynamical Systems2016

    • Place of Presentation
      Kyoto University, Kyoto, Japan
    • Year and Date
      2016-03-16
    • Related Report
      2015 Annual Research Report

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Published: 2015-11-26   Modified: 2024-03-26  

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