Monte Carlo simulations for two-dimensional Ising system far from equilibrium

作     者：LEI XiaoWei ZHENG Ji ZHAO XiaoYu 

作者机构：Department of Physics and Information Engineering Chongqing University of Arts and Sciences Chongqing 402160 China College of Applied Science and Technology Chongqing University of Art and Sciences Chongqing 402160 China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2007年第52卷第3期

页      面：307-312页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the Science and Technology Research Program of Municipal Education Committee of Chongqing of China (Grant No. KJ061208) 

主　　题：二维Ising系统 临界行为 非平衡态弛豫 相变 蒙特卡洛模拟 

摘      要：With a dynamic Monte Carlo simulation, which is free of critical slowing down, the critical behavior of two-dimensional Ising model at non-equilibrium states is investigated. We focus on the two-time autocorrelation function A(t, t ) to identify the dynamic exponent z in two different evolution stages, quenched from a high temperature state and a completely ordered state to the critical state at TC, re-spectively. By using the heat-bath algorithm, the dynamic critical exponent is estimated as z ≈ 2.16. As a result, the universality of the scaling behavior is verified numerically, and the exponent λC is deter-mined complete by λC = β /ν for the evolutions from an initial completely ordered state.