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arXiv 1004.4486cond-mat.stat-mech
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三维Ising普适类格子模型的有限尺寸标度研究

A Finite Size Scaling Study of Lattice Models in the three-dimensional Ising Universality Class

Martin Hasenbusch

摘要:

我们模拟了自旋为1/2的伊辛模型和Blume-Capel模型在不同的参数D值的简单立方晶格。我们进行了有限尺寸标度的研究晶格的线性尺寸L=360,以获得准确的估计临界指数。我们专注于D的值,其中领先的修正幅度很小。此外,我们采用改进的观测值,有一个小幅度的领先的校正。我们得到nu=0.63002(10),eta=0.03627(10)和omega=0.832(6)。我们比较了我们的结果与以前的蒙特卡罗模拟和高温系列展开的晶格模型,通过使用场论方法和实验。

英文摘要:

We simulate the spin-1/2 Ising model and the Blume-Capel model at various values of the parameter D on the simple cubic lattice. We perform a finite size scaling study of lattices of a linear size up to L=360 to obtain accurate estimates for critical exponents. We focus on values of D, where the amplitudes of leading corrections are small. Furthermore we employ improved observables that have a small amplitude of the leading correction. We obtain nu=0.63002(10), eta=0.03627(10) and omega=0.832(6). We compare our results with those obtained from previous Monte Carlo simulations and high temperature series expansions of lattice models, by using field theoretic methods and experiments.

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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