Role of correlations in the thermalization of quantum systems
arXiv:1207.3700 · doi:10.1088/1367-2630/14/11/113034
Abstract
We investigate the equilibration and thermalization properties of quantum systems interacting with a finite dimensional environment. By exploiting the concept of time averaged states, we introduce a completely positive map which allows to describe in a quantitative way the dependence of the equilibrium state on the initial condition. Our results show that the thermalization of quantum systems is favored if the dynamics induces small system-environment correlations, as well as small changes in the environment, as measured by the trace distance.
arXiv comment15 pages, 2 figures
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