ACCURATE ESTIMATES OF 3D ISING CRITICAL EXPONENTS USING THE COHERENT-ANOMALY METHOD

被引：19

作者：

KOLESIK, M ^{[1
]}

SUZUKI, M ^{[1
]}

机构：

[1] SLOVAK ACAD SCI,INST PHYS,BRATISLAVA 84228,SLOVAKIA

来源：

PHYSICA A | 1995年 / 215卷 / 1-2期

关键词：

D O I：

10.1016/0378-4371(94)00302-A

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An analysis of the critical behavior of the three-dimensional Ising model using the coherent-anomaly method (CAM) is presented. Various sources of errors in CAM estimates of critical exponents are discussed, and an improved scheme for the CAM data analysis is tested. Using a set of mean-field type approximations based on the variational series expansion approach, accuracy comparable to the most precise conventional methods has been achieved. Our results for the critical exponents are given by alpha = 0.108(5), beta = 0.327(4), gamma = 1.237(4) and delta = 4.77(5).

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页码：138 / 151

页数：14

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