Negative differential conductivity in Heisenberg XXZ chain far from equilibrium
Quantum Physics
2007-05-23 v1 Statistical Mechanics
Abstract
Negative differential conductivity is reported for the far from equilibrium quantum spin transport in the insulating regime (J_x < J_z) of finite Heisenberg XXZ spin 1/2 chains. The phenomenon is reproduced analytically for small chains of N=4 spins and further analyzed numerically, for up to N=16, using an efficient pure-state simulation with stochastic spin baths.
Keywords
Cite
@article{arxiv.0704.2252,
title = {Negative differential conductivity in Heisenberg XXZ chain far from equilibrium},
author = {Tomaz Prosen},
journal= {arXiv preprint arXiv:0704.2252},
year = {2007}
}
Comments
Unpublished notes, written up in February 2004, 5 pages with 3 .eps figures