Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method

被引：146

作者：

Shibata, N

机构：

[1] Institute for Solid State Physics, University of Tokyo, Tokyo 106, 7-22-1 Roppongi, Minato-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1997年 / 66卷 / 08期

关键词：

density matrix; renormalization group; Heisenberg model; anisotropy; magnetic susceptibility; specific heat;

D O I：

10.1143/JPSJ.66.2221

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The density matrix renormalization group (DMRG) method is applied to the anisotropic Heisenherg chain at finite temperatures. The free energy of the system is obtained using the quantum transfer matrix which is iteratively enlarged in the imaginary time direction. The magnetic susceptibility and the specific heat are calculated down to T = 0.01J and compared with the Bethe ansatz results. The agreement including the logarithmic correction in the magnetic susceptibility at the isotropic point is fairly good.

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页码：2221 / 2223

页数：3

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