CORRELATION LENGTH AND FREE-ENERGY OF THE S=1/2 XYZ CHAIN

被引：66

作者：

TAKAHASHI, M

机构：

[1] Institute for Solid State Physics, University of Tokyo, Roppongi, Minato-ku

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.43.5788

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A set of equations that allows one to calculate the correlation length and the free energy of the S = 1/2 XYZ chain at a given temperature is obtained. It contains infinite unknown numbers and is derived by the largest and the second-largest eigenvalues of the quantum transfer matrix in the limit of infinite Trotter number. The numerical solution of this set of equations gives very accurate values of the free energy and the correlation length at arbitrary temperature. The energy gaps that appear in the correlation length and the free energy at low temperature are discussed.

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页码：5788 / 5797

页数：10

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