Computing statistical physics study on nonequilibrium phenomena

2010 Fiscal Year Final Research Report

• Project/Area Number: 19340110
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: The University of Tokyo
• Principal Investigator: ITO Nobuyasu The University of Tokyo, 大学院・工学系研究科, 准教授 (70211745)
• Co-Investigator(Kenkyū-buntansha): SHIMADA Takashi 東京大学, 大学院・工学系研究科, 助教 (90431791)
• Project Period (FY): 2007 – 2010
• Keywords: 非平衡現象 / 熱伝導 / 異常輸送 / 動的臨界現象 / 普遍性 / 非平衡緩和法 / 双極子 / 相互作用 / 非平衡シミュレーション / 輸送現象 / 相転移 / 生態系 / 進化 / 電気伝導

Research Abstract

In this research project, linear and nonlinear nonequilibrium phenomena are studied based on molecular motion. It was shown that local distribution function depends on direction of molecular motion, and that nonlinear nonequilibrium phenomena could be reproduced using millions of particles. Thermally activated breakdown of some material under subcritical stress was studied using phenomenological model elements, and power-law dependence of its life time on material size was shown. Studies on variety and diversity of ecosystem and econosystem discovered that they are characterized by a stretched exponential distribution with exponent1/2.

Research Products

• [Journal Article] Random walk in genome space : A key ingredient of intermittent dynamics of community assembly on evolutionary time scales (2010)
  • Author(s): Y.Murase, T.Shimada, N.Ito, P.A.Rikvold
  • Journal Title: Journal of Theoretical Biology 264巻 Pages: 663-672
  • Peer Reviewed
• [Journal Article] Effects of demographic stochasticity on biological community assembly on evolutionary time scales (2010)
  • Author(s): Y.Murase, T.Shimada, N.Ito, P.A.Rikvold
  • Journal Title: Physical Reviw E 81巻 Pages: 041908-1～14
  • Peer Reviewed
• [Journal Article] Efficiency of Rejection-Free Methods for Dynamic Monte Carlo Studies of Off-lattice Interacting Particles (2009)
  • Author(s): Marta Guerra, Mark Novotny, 渡辺宙志, 伊藤伸泰
  • Journal Title: Physical Review E 79巻 Pages: 026706
  • Peer Reviewed
• [Journal Article] Nonequilibrium, Microscopic Distribution of Thermal Current in Particle Systems (2009)
  • Author(s): 湯川諭、島田尚、小串典子、伊藤伸泰
  • Journal Title: Journal of Physics Society Japan 78巻 Pages: 023002
  • Peer Reviewed
• [Journal Article] Distribution in flowing reaction-diffusion systems (2009)
  • Author(s): 上村淳、Hans J.Herrmann、伊藤伸泰
  • Journal Title: Physical Review E 80巻 Pages: 061132-1～5
  • Peer Reviewed
• [Journal Article] The Avogadro Challenge-Nanodynamics Study on Nonequilibrium Problems (2009)
  • Author(s): 湯川諭、伊藤伸泰
  • Journal Title: Progress of Theoretical Physics Supplement 178巻 Pages: 24-32
  • Peer Reviewed
• [Journal Article] Dynamic critical exponents of three-dimensional Ising models and two-dimentional, tree-states Potts models (2008)
  • Author(s): Y.Murase, N.Ito
  • Journal Title: Journal of Physics Society Japan 77巻 Pages: 014002-1～5
  • Peer Reviewed
• [Journal Article] Nonequilibrium Molecular Dynamics Simulations on Thermal Diffusion in Binary Mixtures of Hard Spheres (2008)
  • Author(s): 上村淳、伊藤伸泰
  • Journal Title: Journal of Physics Society Japan 77巻 Pages: 125001
  • Peer Reviewed
• [Journal Article] Thermodynamics of a binary monolayer of Ising dipolar particles. II.Effect of relative moment (2008)
  • Author(s): 鈴木将、Ferenc Kun、伊藤伸泰
  • Journal Title: Physical Review E 78巻 Pages: 041118
  • Peer Reviewed
• [Journal Article] Size scaling and bursting activity in thermally activated breakdown of fiber bundles (2008)
  • Author(s): 吉岡直樹、Ferenc Kun、伊藤伸泰
  • Journal Title: Physical Review Letter 101巻 Pages: 145502
  • Peer Reviewed
• [Presentation] Diversifying system (2010)
  • Author(s): 伊藤伸泰
  • Organizer: Workshop on High Performance Computing and Applications
  • Place of Presentation: Beijing Computational Science Research Center, Beijing, China(招待講演)
  • Year and Date: 2010-12-04
• [Presentation] Trend of HPC and applications (2010)
  • Author(s): 伊藤伸泰
  • Organizer: Workshop on High Performance Computing and Applications
  • Place of Presentation: Beijing Computational Science Research Center, Beijing, China(招待講演)
  • Year and Date: 2010-12-03
• [Presentation] Diversifying Systems (2010)
  • Author(s): 伊藤伸泰
  • Organizer: APCTP Workshop on Current Progress of Simulations in Complex Systems
  • Place of Presentation: APCTP Headquarters, Pohang, Korea(招待講演)
  • Year and Date: 2010-11-17
• [Presentation] Universality in ecoevolution (2010)
  • Author(s): 伊藤伸泰
  • Organizer: 2^<nd> Debrecen Workshop on Statistical Physics of Fracture and other Complex Systems
  • Place of Presentation: Debrecen University, Debrecen, Hungary(招待講演)
  • Year and Date: 2010-09-13
• [Presentation] A simple model of Ribosome (2010)
  • Author(s): N.Ito, S.Matsumoto, F.Takagi
  • Organizer: The 10^<th> Taiwan International Symposium on Statistical Physics
  • Place of Presentation: Academia Sinica, Taipei, Republic of China(招待講演)
  • Year and Date: 2010-07-28
• [Presentation] Universality in ecoevolution (2010)
  • Author(s): 伊藤伸泰
  • Organizer: StatPhysHK-Complexity, Computaiton,Information
  • Place of Presentation: Baptisut University, Hong Kong, China(招待講演)
  • Year and Date: 2010-07-14
• [Presentation] Diversifying dynamics and their universality (2010)
  • Author(s): 伊藤伸泰
  • Organizer: Conference on Computational Physics 2010
  • Place of Presentation: Trondheim, Norway(招待講演)
  • Year and Date: 2010-06-26
• [Presentation] Simulation Study of Nonequilibrium State (2009)
  • Author(s): 伊藤伸泰
  • Organizer: 2009年計算物理国際会議
  • Place of Presentation: 高雄、台湾(招待講演)
  • Year and Date: 2009-12-16
• [Presentation] From Molecules to Ecosystems (2009)
  • Author(s): 伊藤伸泰
  • Organizer: Taiwan International Workshop on Biophysics and Complex Systems
  • Place of Presentation: 台北、台湾(招待講演)
  • Year and Date: 2009-12-10
• [Presentation] Simulation study on nonequilibrium transport phenomena (2009)
  • Author(s): 伊藤伸泰
  • Organizer: 第10回International NTZ-Workshop on New Developments in Computational Physics : CompPhys09
  • Place of Presentation: ライプツィヒ、ドイツ(招待講演)
  • Year and Date: 2009-11-26
• [Presentation] 破壊の計算統計力学 (2009)
  • Author(s): 伊藤伸泰
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 熊本大学(招待講演)
  • Year and Date: 2009-09-27
• [Presentation] Toward Exaflops Applications : Molecular Dynamics Simulation of Liquid-Gas Transition (2009)
  • Author(s): 伊藤伸泰
  • Organizer: The 11^<th> International Specialist Meeting on The Next generation Models on Climate Change and Sustainability for Advanced High-performance Computing Facilities
  • Place of Presentation: オークリッジ、米国(招待講演)
  • Year and Date: 2009-03-17
• [Presentation] The Avogadro Challenge-Nanodynamics Study on Nonequilibrium Problems (2008)
  • Author(s): 伊藤伸泰
  • Organizer: Japan-US Bilateral Workshop "Large-scale Molecular Dynamics Simulation and Related Topics"
  • Place of Presentation: バークレー、米国
  • Year and Date: 2008-09-25
• [Presentation] Nanodynamics Study on Nonequilibrium Problems (2008)
  • Author(s): 伊藤伸泰
  • Organizer: Conference on Computational Physics
  • Place of Presentation: オウロプレット、ブラジル
  • Year and Date: 2008-08-08
• [Presentation] The Avogadro Challenge : Nanodynamics Study on Nonequilibrium Problems (2008)
  • Author(s): 伊藤伸泰
  • Organizer: The 9^<th> Taiwan International Symposium on Statistical Physics
  • Place of Presentation: 台北、台湾
  • Year and Date: 2008-07-09
• [Presentation] Simulation Study on Nanoscale Engine (2008)
  • Author(s): 伊藤伸泰
  • Organizer: International workshop on transmission of information and energy in nonlinear and complex systems 2008
  • Place of Presentation: シンガポール
  • Year and Date: 2008-06-05
• [Presentation] The Avogadro Challenge : Nanodynamics Study on Nonequilibrium (2008)
  • Author(s): 伊藤伸泰
  • Organizer: King Abdullah University of Science and Technoligy Global Research Partnership Awards Presentation and Technical Symposium
  • Place of Presentation: ジェッダ、サウジアラビア
  • Year and Date: 2008-05-28
• [Presentation] Hard particle,an everlasting model of computing statistical mechanics (2007)
  • Author(s): 伊藤伸泰
  • Organizer: Symposium on the 50^<th> Anniversary of the Alder Transition-Recent Progress on Computational Statistical Physics
  • Place of Presentation: 金沢(招待講演)
  • Year and Date: 2007-11-29
• [Presentation] Nanoengine simulation (2007)
  • Author(s): 伊藤伸泰
  • Organizer: The 4^<th> International Workshop Hangzhou 2007 on Simulational Physics
  • Place of Presentation: Hangzhou, China(招待講演)
  • Year and Date: 2007-11-10
• [Presentation] Stasistical mechanical simulation of nonequilibrium phenomena and its application (2007)
  • Author(s): 伊藤伸泰
  • Organizer: 10^<th> Asia-Pacific Physics Conference
  • Place of Presentation: Pohang, Korea(招待講演)
  • Year and Date: 2007-08-23
• [Remarks] ホームページ
  • URL: http://aph.t.u-tokyo.ac.jp/~ito