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Type: Artigo de periódico
Title: Nonextensive approach to decoherence in quantum mechanics
Author: Vidiella-Barranco, A
Moya-Cessa, H
Abstract: We propose a nonextensive generalization (q-parametrized) of the von Neumann equation for the density operator. Our model naturally leads to the phenomenon of decoherence, and unitary evolution is recovered in the: limit of q --> 1. The resulting evolution yields a nonexponential decay for quantum coherences, fact that might be attributed to nonextensivity. We discuss, as an example, the loss of coherence observed in trapped ions. (C) 2001 Elsevier Science B.V. All rights reserved.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0375-9601(00)00820-3
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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