期刊
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
卷 -, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1742-5468/2011/12/P12008
关键词
spin chains; ladders and planes (theory); quantum transport in one dimension; quantum transport
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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