arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.0938cond-mat.stat-mechcond-mat.other
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接近平衡和集群分布

Approaching equilibrium and the distribution of clusters

Hui Wang, Kipton Barros, Harvey Gould, W. Klein

摘要:

本文研究了用团簇表示法求解伊辛模型稳定和亚稳定平衡态的方法。使用Metropolis算法和使用Langevin动力学的相应$ϕ^{4}$模型确定成核时间的分布。我们发现,成核率被抑制在早期的时候,即使在全球变量,如磁化强度和能量显然已经达到其时间无关的值。其大小与成核液滴的大小相当的簇的平均数在成核速率达到其恒定值的大约同时变得与时间无关。我们还发现了微妙的结构之间的差异形成的成核液滴之前和之后,表观亚稳平衡已经建立。

英文摘要:

We investigate the approach to stable and metastable equilibrium in Ising models using a cluster representation. The distribution of nucleation times is determined using the Metropolis algorithm and the corresponding $ϕ^{4}$ model using Langevin dynamics. We find that the nucleation rate is suppressed at early times even after global variables such as the magnetization and energy have apparently reached their time independent values. The mean number of clusters whose size is comparable to the size of the nucleating droplet becomes time independent at about the same time that the nucleation rate reaches its constant value. We also find subtle structural differences between the nucleating droplets formed before and after apparent metastable equilibrium has been established.

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。

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