arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.07256cond-mat.stat-mech
收藏

完全图上Fortuin-Kasteleyn伊辛模型的渗流效应

Percolation effects in the Fortuin-Kasteleyn Ising model on the complete graph

Sheng Fang, Zongzheng Zhou, Youjin Deng

摘要:

Fortuin-Kasteleyn(FK)无规团簇模型是一个关联键逾渗模型,它可以精确地映射自$q$态Potts自旋模型。通过广泛的蒙特卡罗模拟,研究了临界伊辛模型($q=2$)在有限完全图上的FK键表示,即平均场伊辛模型.我们提供了强有力的数值证据,$q=2$的配置空间包含一个渐近消失的部门,其中的数量表现出相同的有限尺寸标度的临界不相关键渗流($q=1$)的完整的图形。此外,我们观察到,在完整的配置空间中,幂律行为的集群大小分布的FK伊辛集群,除了最大的一个是由Fisher指数采取$q=1$的值,而不是$q=2$。这在完全图上展示了FK伊辛模型中的逾渗效应。

英文摘要:

The Fortuin-Kasteleyn (FK) random cluster model, which can be exactly mapped from the $q$-state Potts spin model, is a correlated bond percolation model. By extensive Monte Carlo simulations, we study the FK bond representation of the critical Ising model ($q=2$) on a finite complete graph, i.e. the mean-field Ising model. We provide strong numerical evidence that the configuration space for $q=2$ contains an asymptotically vanishing sector in which quantities exhibit the same finite-size scaling as in the critical uncorrelated bond percolation ($q=1$) on the complete graph. Moreover, we observe that in the full configuration space, the power-law behaviour of the cluster-size distribution for the FK Ising clusters except the largest one is governed by a Fisher exponent taking the value for $q=1$ instead of $q=2$. This demonstrates the percolation effects in the FK Ising model on the complete graph.

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。

↑