Transport in a one-dimensional isotropic Heisenberg model at high temperature

被引：41
|
作者：
Znidaric, Marko [1 ,2 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Cuernavaca 62191, Morelos, Mexico
[2] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia
来源：
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2011年
关键词：
spin chains; ladders and planes (theory); quantum transport in one dimension; quantum transport; DYNAMICAL SEMIGROUPS; SYSTEMS;
D O I：
10.1088/1742-5468/2011/12/P12008
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Magnetization transport in a one-dimensional isotropic spin 1/2 Heisenberg model is studied. It is shown that in a nonequilibrium steady state at high temperature and constant small driving the magnetization current depends on the system length L as similar to 1/L-0.5, meaning that the diffusion constant diverges as similar to L-0.5. Spectral properties of a superoperator governing the relaxation towards a nonequilibrium steady state are also discussed.
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收藏
页数：12
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