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Cooperative behavior of fluctuating dynamical events

Research Project

Project/Area Number 19540394
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionThe University of Tokyo

Principal Investigator

SASA Shin-ichi  The University of Tokyo, 大学院・総合文化研究科, 教授 (30235238)

Project Period (FY) 2007 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords協同現象 / ゆらぎ / ダイナミクス / ジャミング / ガラス / 動力学 / 雪崩 / 非平衡 / ガラス転移
Research Abstract

An assembly of many elements often exhibits coherent behavior at a collective level. Such behavior is an example of cooperative phenomena, which appear in physical systems and also in social systems. Among many types of cooperative phenomena, recently, a new type of dynamically cooperative phenomenon was found in glassy systems. In this research subject, we have found this phenomenon in several systems other than glassy systems. Furthermore, we have developed theoretical methods for analyzing it and calculated quantities that characterizes the cooperative phenomenon.

Report

(4 results)
  • 2009 Annual Research Report   Final Research Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (45 results)

All 2010 2009 2008 2007 Other

All Journal Article (22 results) (of which Peer Reviewed: 10 results) Presentation (20 results) Remarks (3 results)

  • [Journal Article] A universal form of slow dynamics in zero-temperature random field Ising model2010

    • Author(s)
      H. Ohta, S. Sasa
    • Journal Title

      Europhys.Lett. 90

      Pages: 27008-27008

    • Related Report
      2009 Final Research Report
  • [Journal Article] Two Langevin equations in the Doi-Peliti formalism2010

    • Author(s)
      K. Itakura, J. Ohkubo, S. Sasa
    • Journal Title

      J.Phys.A : Math.Theor. 43

      Pages: 125001-125001

    • Related Report
      2009 Final Research Report
  • [Journal Article] Two Langevin equation in the Doi-Peliti formalism2010

    • Author(s)
      K.Itakura, J.Ohkubo, S.Sasa
    • Journal Title

      J.Phys.A : Math.Theor 43

      Pages: 125001-125001

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Singular perturbation near mode-coupling transitions2009

    • Author(s)
      M. Iwata, S. Sasa
    • Journal Title

      J.Phys.A : Math.Theor. 42

    • Related Report
      2009 Final Research Report
  • [Journal Article] Dynamics of k-core percolation in a random graph2009

    • Author(s)
      M. Iwata, S. Sasa
    • Journal Title

      J.Phys.A : Math.Theor. 42

    • Related Report
      2009 Final Research Report
  • [Journal Article] Representatiom of non-equilibrium steady states in large mechanical systems2009

    • Author(s)
      T. S. Komatsu, N. Nakagawa, S. Sasa, H. Tasaki
    • Journal Title

      J.Stat.Phys. 134

      Pages: 401-423

    • Related Report
      2009 Final Research Report
  • [Journal Article] singular perturbation near mode coupling transition2009

    • Author(s)
      M.Iwata, S.Sasa
    • Journal Title

      J.Phys.A : Math.Theor. 42

      Pages: 245001-245001

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Representation of nonequilibrium steady states in large mechanical systems2009

    • Author(s)
      T.S.Komatsu, N.Nakagawa, S.Sasa, H.Tasaki
    • Journal Title

      J.Stat.Phys. 134

      Pages: 401-423

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamics of k-core percolation in a random graph2009

    • Author(s)
      M. Iwata and S. Sasa
    • Journal Title

      J. Phys. A: Math. Theor. 42

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Steady State Thermodynamics for heat conduction-microscopic derivation2008

    • Author(s)
      T. S. Komatsu, N. Nakagawa, S. Sasa, H. Tasaki
    • Journal Title

      Phys.Rev.Lett. 100

    • Related Report
      2009 Final Research Report
  • [Journal Article] Scale-free patterns near a saddle node bifurcation in a stochastic system2008

    • Author(s)
      M. Iwata, S. Sasa
    • Journal Title

      Phys.Rev. E78

    • Related Report
      2009 Final Research Report
  • [Journal Article] Critical phenomena in globally coupled exitable elements2008

    • Author(s)
      H. Ohta, S. Sasa
    • Journal Title

      Phys.Rev. E78

    • Related Report
      2009 Final Research Report
  • [Journal Article] Critical fluctuations of time-dependentmagnetization in ordering processes near the disorder-induced critical point2008

    • Author(s)
      H. Ohta, S. Sasa
    • Journal Title

      Phys.Rev. E77

    • Related Report
      2009 Final Research Report
  • [Journal Article] A perturbation theory for large deviation functionals in fluctuating hydrodynamics2008

    • Author(s)
      S. Sasa
    • Journal Title

      J.Phys.A : Math.Theor. 41

    • Related Report
      2009 Final Research Report
  • [Journal Article] The order-disorder transition in colloidal suspensions under shear flow2008

    • Author(s)
      M. J. Miyama, S. Sasa
    • Journal Title

      J.Phys. : Condense.Matter 20

    • Related Report
      2009 Final Research Report
  • [Journal Article] A fluctuation-response relation of many Brownian particles under non-equilibrium conditions2008

    • Author(s)
      T. Nakamura, S. Sasa
    • Journal Title

      Phys.Rev. E, 77

    • Related Report
      2009 Final Research Report
  • [Journal Article] Critical phenomena in globally coupled excitable elements2008

    • Author(s)
      H. Ohta and S. Sasa
    • Journal Title

      Phys. Rev. E 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Scale free patterns at a saddle-node bifurcation in a stochastic system2008

    • Author(s)
      M. Iwata and S. Sasa
    • Journal Title

      Phys. Rev. E 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The order disorder transition in colloidal suspensions under shear flow2008

    • Author(s)
      M. J. Miyama and S. Sasa
    • Journal Title

      J. Phys.: Consdens. Matter 20

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A perturbation theory for large deviation functional in fluctuating hydrodynamics2008

    • Author(s)
      S. Sasa
    • Journal Title

      J. Phys. A; Math. Theor. 41

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A fluctuation-response relation of many Brownian particles under non-equilibrium conditions2008

    • Author(s)
      T. Nakamura and S. Sasa
    • Journal Title

      Phys. Rev. E 77

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical fluctuations of time dependent magnetization in ordering processes near the disorder induced critical point2008

    • Author(s)
      H.Ohta and S. Sasa
    • Journal Title

      Phys. Rev. E 77

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 剪断流下コロイド結晶に対する剪断率ゼロ極限の特異性2010

    • Author(s)
      観山正道, 佐々真一
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-23
    • Related Report
      2009 Final Research Report
  • [Presentation] エイジングダイナミクスの特徴づけ2010

    • Author(s)
      岩田真実, 佐々真一
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-21
    • Related Report
      2009 Final Research Report
  • [Presentation] ランダムグラフ上多体動力学模型の厳密分岐解析2010

    • Author(s)
      太田洋輝, 佐々真一
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-21
    • Related Report
      2009 Final Research Report
  • [Presentation] ランダムグラフ上多体動力学模型の厳密分岐解析2010

    • Author(s)
      佐々真一
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-21
    • Related Report
      2009 Annual Research Report
  • [Presentation] 線状ペンタマー系における動的異常性2010

    • Author(s)
      神田大樹, 佐々真一
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-20
    • Related Report
      2009 Final Research Report
  • [Presentation] spherical p-spin 模型におけるモード結合方程式の特異摂動法による解析2009

    • Author(s)
      岩田真実, 佐々真一
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-27
    • Related Report
      2009 Final Research Report
  • [Presentation] 熱力学ガラス転移は存在するか2009

    • Author(s)
      佐々真一, 福島孝治
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-26
    • Related Report
      2009 Final Research Report
  • [Presentation] 液-固相転移点近傍における応力と剪断率の関係2009

    • Author(s)
      観山正道, 佐々真一
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-26
    • Related Report
      2009 Final Research Report
  • [Presentation] ASEPにおけるシャノン・エントロピーの熱力学的測定2009

    • Author(s)
      観山正道, 佐々真一
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-29
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移の数理2009

    • Author(s)
      佐々真一
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移と k-core percolation2009

    • Author(s)
      岩田真実, 佐々真一
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移を示す格子モデル2009

    • Author(s)
      太田洋輝, 佐々真一
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移と非線形記憶2009

    • Author(s)
      佐々真一, 岩田真実, 太田洋輝
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移の数理2009

    • Author(s)
      佐々真一
    • Organizer
      日本物理学会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] ランダムグラフにおける k-core percolation のダイナミクス2008

    • Author(s)
      岩田真実, 佐々真一
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2009 Final Research Report
  • [Presentation] ジャミング転移点付近の協同現象と Barkhausen noise2008

    • Author(s)
      太田洋輝, 佐々真一
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2009 Final Research Report
  • [Presentation] 結合興奮性素子モデルにおける動的協同現象の理論解析2008

    • Author(s)
      太田洋輝, 佐々真一
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-26
    • Related Report
      2009 Final Research Report
  • [Presentation] 剪断流下のコロイド分散系におけるシャノン・エントロピーの熱測定とその物理的意義2008

    • Author(s)
      観山正道, 佐々真一
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-24
    • Related Report
      2009 Final Research Report
  • [Presentation] 剪断流下のコロイド分散系の構造変化に対する熱力学測定2007

    • Author(s)
      観山正道, 佐々真一
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-24
    • Related Report
      2009 Final Research Report
  • [Presentation] 非線形振動子系における動的事象の臨界揺らぎ2007

    • Author(s)
      太田洋輝, 佐々真一
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-23
    • Related Report
      2009 Final Research Report
  • [Remarks] ホームページ等

    • URL

      http://kamuy.c.u-tokyo.ac.jp

    • Related Report
      2009 Final Research Report
  • [Remarks]

    • URL

      http://kamuy.c.u-tokyo.ac.jp/publication.html

    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://kamuy.c.u-tokyo.ac.jp/publication.html

    • Related Report
      2007 Annual Research Report

URL: 

Published: 2007-04-01   Modified: 2016-04-21  

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