Transport in a one-dimensional isotropic Heisenberg model at high temperature
Strongly Correlated Electrons
2012-03-05 v1 Quantum Physics
Abstract
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 1/L^{0.5}, meaning that the diffusion constant diverges as L^{0.5}. Spectral properties of a superoperator governing the relaxation towards a nonequilibrium steady state are also discussed.
Keywords
Cite
@article{arxiv.1112.2551,
title = {Transport in a one-dimensional isotropic Heisenberg model at high temperature},
author = {Marko Znidaric},
journal= {arXiv preprint arXiv:1112.2551},
year = {2012}
}
Comments
12 pages, 6 figures