APPLICATION OF THE CONNECTED-MOMENTS EXPANSION TO THE HALF-FILLED HUBBARD-MODEL

被引：7
|
作者：
LEE, KC
LO, CF
机构：
[1] Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories
来源：
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1993年 / 15卷 / 12期
关键词：
GENERAL THEORY AND MODELS OF MAGNETIC ORDERING;
D O I：
10.1007/BF02451940
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper we have applied the method of connected-moments expansion to investigate the ground state of the half-filled Hubbard model for both the linear chain and the square lattice. The CMX series appear very unstable and give rather poor estimates of the ground-state energies. This seems to suggest that it does not provide a useful method for estimating ground-state energies of this model.
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页码：1483 / 1487
页数：5
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