Variational method and duality in the 2D square Potts model

被引：0

作者：

Angelini, L ^{[1
]}

Pellicoro, M ^{[1
]}

Sardella, I ^{[1
]}

Villani, M ^{[1
]}

机构：

[1] IST NAZL FIS NUCL, SEZ BARI, I-70126 BARI, ITALY

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1997年 / 30卷 / 22期

关键词：

D O I：

10.1088/0305-4470/30/22/008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ferromagnetic q-states Potts model on a square lattice is analysed, for q > 4, through an elaborate version of the operatorial variational method. In the variational approach proposed in this paper, the duality relations are exactly satisfied, involving at a more fundamental level, a duality relationship between variational parameters. Besides some exact predictions, the approach is very effective in the numerical estimates over a wide range of temperature and can be systematically improved.

引用

页码：7677 / 7693

页数：17

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