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26 April 2024
 
  » arxiv » 1210.4394

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Ground state cooling is not possible given initial system-thermal bath factorization
Lian-Ao Wu ; Dvira Segal ; Paul Brumer ;
Date 16 Oct 2012
AbstractIn 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.
Source arXiv, 1210.4394
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