Ground state cooling is not possible given initial system-thermal bath factorization
Quantum Physics
2016-07-07 v1
Abstract
In this paper we prove that a fundamental constraint on the cooling dynamic implies that it is impossible to cool, via a unitary system-bath quantum evolution, a system that is embedded in a thermal environment down to its ground state, if the initial state is a factorized product of system and bath states. The latter is a crucial but artificial assumption often included in many descriptions of system-bath dynamics. The analogous conclusion holds for 'cooling' to any pure state of the system.
Cite
@article{arxiv.1210.4394,
title = {Ground state cooling is not possible given initial system-thermal bath factorization},
author = {Lian-Ao Wu and Dvira Segal and Paul Brumer},
journal= {arXiv preprint arXiv:1210.4394},
year = {2016}
}
Comments
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