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arXiv 1107.2893cond-mat.stat-mechcond-mat.dis-nn
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几何受挫Ising系统的小网络逼近

Small-Network Approximations for Geometrically Frustrated Ising Systems

Bilin Zhuang, Courtney Lannert

摘要:

阻挫自旋系统的研究往往需要耗时的数值模拟。经典的伊辛模型是研究这类系统热力学行为的最简单的方法。利用小的相关长度在挫折伊辛系统中,我们开发了一种方法,用于获得一级近似的能量性质的挫折二维伊辛系统使用小于30自旋的小网络。这些小的网络允许更快的数值模拟,更重要的是,从配分函数的属性的分析计算是可能的。我们选择伊辛系统的三角形格,Kagome格,三角形Kagome格作为原型系统,并找到小的系统,可以作为这些原型系统的良好近似。我们还开发了标准,用于构建小网络,以近似一般的二维挫折伊辛系统。这种使用小网络的方法提供了一种新颖而有效的方法来获得对受抑自旋系统性质的一级近似。

英文摘要:

The study of frustrated spin systems often requires time-consuming numerical simulations. As the simplest approach, the classical Ising model is often used to investigate the thermodynamic behavior of such systems. Exploiting the small correlation lengths in frustrated Ising systems, we develop a method for obtaining a first approximation to the energetic properties of frustrated two-dimensional Ising systems using small networks of less than 30 spins. These small networks allow much faster numerical simulations, and more importantly, analytical calculation of the properties from the partition function is possible. We choose Ising systems on the triangular lattice, the Kagome lattice, and the triangular Kagome lattice as prototype systems and find small systems that can serve as good approximations to these prototype systems. We also develop criteria for constructing small networks to approximate general two-dimensional frustrated Ising systems. This method of using small networks provides a novel and efficient way to obtain a first approximation to the properties of frustrated spin systems.

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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