Low-temperature transport in Heisenberg chains

被引：81

作者：

Alvarez, JV ^{[1
]}

Gros, C ^{[1
]}

机构：

[1] Univ Saarland, Fak 7, D-66041 Saarbrucken, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.88.077203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A technique to determine accurately transport properties of integrable and nonintegrable quantum-spin chains at finite temperatures by quantum Monte Carlo is presented. The reduction of the Drude weight by interactions in the integrable gapless regime is evaluated. Evidence for the absence of Drude weight in the gapless regime of a nonintegrable system with longer-ranged interactions is presented. We estimate the effect of the nonintegrability on the transport properties and compare with recent experiments on one-dimensional quantum-spin chains.

引用

页数：4

共 23 条

[1] On the evaluation of the specific heat and general off-diagonal n-point correlation functions within the loop algorithm [J].