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Type: Artigo de periódico
Title: Decoherence induced by a phase-damping reservoir
Author: Angelo, RM
Cardoso, ES
Furuya, K
Abstract: A phase damping reservoir composed by N-bosons coupled to a system of interest through a cross-Kerr interaction is proposed and its effects on quantum superpositions are investigated. By means of analytical calculations we show that: (i) the reservoir induces a Gaussian decay of quantum coherences, and (ii) the inherent incommensurate character of the spectral distribution yields irreversibility. A state-independent decoherence time and a master equation are both derived analytically. These results, which have been extended for the thermodynamic limit, show that nondissipative decoherence can be suitably contemplated within the environment-induced decoherence (EID) approach. Finally, it is shown that the same mechanism yielding decoherence are also responsible for inducing dynamical disentanglement.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review A. Amer Physical Soc, v. 73, n. 6, 2006.
Rights: aberto
Identifier DOI: 10.1103/PhysRevA.73.062107
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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