arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.02329cond-mat.stat-mech
收藏

基于粒子的伊辛模型

A particle-based Ising model

Quentin Novinger, Antonio Suma, Daniel Sigg, Giuseppe Gonnella, Vincenzo Carnevale

摘要:

我们描述的平衡性质和弛豫动力学的二维晶格包含,在每个网站上,两个粒子连接的双势阱(哑铃)。哑铃是定向在正交方向上相对于晶格平面和相互作用,通过一个Lennard-Jones势截断在最近的邻居距离。我们表明,该系统的平衡性质准确地描述了一个二维伊辛模型与适当的耦合常数。此外,我们通过计算作为时间的函数的簇大小的粗化动力学的特征和比较的结果与蒙特卡罗模拟的基础上,Glauber或反应动力学速率常数。

英文摘要:

We characterize equilibrium properties and relaxation dynamics of a two-dimensional lattice containing, at each site, two particles connected by a double-well potential (dumbbell). Dumbbells are oriented in the orthogonal direction with respect to the lattice plane and interact with each other through a Lennard-Jones potential truncated at the nearest neighbor distance. We show that the system's equilibrium properties are accurately described by a two-dimensional Ising model with an appropriate coupling constant. Moreover, we characterize the coarsening kinetics by calculating the cluster size as a function of time and compare the results with Monte Carlo simulations based on Glauber or reactive dynamics rate constants.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑