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arXiv 1008.0965cond-mat.str-elcond-mat.othercond-mat.stat-mechquant-ph
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基于团簇纠缠平均场的经典系统临界性研究

Cluster Entanglement Mean Field inspired approach to Criticality in Classical Systems

Aditi Sen De, Ujjwal Sen

摘要:

我们提出了一种受纠缠平均场论启发的处理相互作用经典多体系统的方法。它涉及一种粗粒化技术,在平均场论之前终止一个步骤:平均场论只处理单体物理参数,而纠缠平均场论处理单体和两体物理参数。我们将该理论改进为一个团簇纠缠平均场,它处理的是多体系统晶格的一个基本单元。我们将这些方法应用于相互作用的伊辛自旋系统在几个晶格几何形状和尺寸,并表明,这些模型的临界性的发病预测是更好地在所提出的理论相比,相应的平均场论。

英文摘要:

We propose an entanglement mean field theory inspired approach for dealing with interacting classical many-body systems. It involves a coarse-graining technique that terminates a step before the mean field theory: While mean field theory deals with only single-body physical parameters, the entanglement mean field theory deals with single- as well as two-body ones. We improve the theory to a cluster entanglement mean field, that deals with a fundamental unit of the lattice of the many-body system. We apply these methods to interacting Ising spin systems in several lattice geometries and dimensions, and show that the predictions of the onset of criticality of these models are much better in the proposed theories as compared to the corresponding ones in mean field theories.

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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