Density matrix approach to local Hilbert space reduction

被引：115

作者：

Zhang, CL ^{[1
]}

Jeckelmann, E ^{[1
]}

White, SR ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.80.2661

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a density matrix approach for treating systems with-a large or infinite number of degrees of freedom per site with exact diagonalization or the density matrix renormalization group. The method is demonstrated on the 1D Holstein model of electrons coupled to Einstein phonons. In this system, two or three optimized phonon modes per site give results as accurate as with 10-100 bare phonon levels per site.

引用

页码：2661 / 2664

页数：4

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