Density-matrix renormalization-group method in momentum space

被引:140
作者
Xiang, T
机构
[1] Research Center in Superconductivity, University of Cambridge, Cambridge CB3 0HE, Madingley Road
来源
PHYSICAL REVIEW B | 1996年 / 53卷 / 16期
关键词
D O I
10.1103/PhysRevB.53.R10445
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A momentum-space approach of the density-matrix renormalization-group (DMRG) method is developed. Ground-state energies of the Hubbard model are evaluated using this method and compared with exact diagonalization as well as quantum Monte Carlo results. It is shown that the momentum-space DMRG is a very useful numerical tool for studying the Hubbard model and other fundamental models of interacting electrons in two dimensions. For the Hubbard model in two dimensions, the momentum-space DMRG method reproduces accurately the exact diagonalization results of ground-state energies on a 4x4 lattice and yields new upper bounds of ground-state energies on an 8x8 lattice.
引用
收藏
页码:10445 / 10448
页数:4
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