Off-diagonal wave function Monte Carlo studies of Hubbard model I

被引：42

作者：

Yanagisawa, T ^{[1
]}

Koike, S ^{[1
]}

Yamaji, K ^{[1
]}

机构：

[1] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 11期

关键词：

Hubbard model; Monte Carlo method; off-diagonal functions;

D O I：

10.1143/JPSJ.67.3867

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a Monte Carlo method, which is a hybrid method of the quantum Monte Carlo method and variational Monte Carlo theory, to study the Hubbard model. The theory is based on the off-diagonal and the Gutzwiller type correlation factors which are taken into account by a Monte Carlo algorithm. In the 4x4 system our method is able to reproduce the exact results obtained by the diagonalization. An application is given to investigate the half-filled band case of two-dimensional square lattice. The energy is favorably compared with quantum Monte Carlo data.

引用

页码：3867 / 3874

页数：8

共 33 条

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