Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/61645
Type: Artigo
Title: Deviations from reversible dynamics in a qubit-oscillator system coupled to a very small environment
Author: Vidiella-Barranco, A.
Abstract: In this contribution it is considered a simple and solvable model consisting of a qubit in interaction with an oscillator exposed to a very small "environment" (a second qubit). An isolated qubit-oscillator system having the oscillator initially in one of its energy eigen-states exhibits Rabi oscillations, an evidence of coherent quantum behaviour. It is shown here in which way the coupling to a small "environment" disrupts such regular behaviour, leading to a quasi-periodic dynamics for the qubit linear entropy. In particular, it is found that the linear entropy is very sensitive to the amount of mixedness of the "environment". For completeness, fluctuations in the oscillator energy are also taken into account. (C) 2014 Elsevier B.V. All rights reserved.
In this contribution it is considered a simple and solvable model consisting of a qubit in interaction with an oscillator exposed to a very small "environment" (a second qubit). An isolated qubit-oscillator system having the oscillator initially in one of its energy eigen-states exhibits Rabi oscillations, an evidence of coherent quantum behaviour. It is shown here in which way the coupling to a small "environment" disrupts such regular behaviour, leading to a quasi-periodic dynamics for the qubit linear entropy. In particular, it is found that the linear entropy is very sensitive to the amount of mixedness of the "environment". For completeness, fluctuations in the oscillator energy are also taken into account.
Subject: Ótica quântica
Eletrodinâmica quântica de cavidades
Jaynes-Cummings, Modelo
Entropia
Country: Holanda
Editor: Elsevier
Citation: Physica A-statistical Mechanics And Its Applications. Elsevier Science Bv, v. 402, n. 209, n. 215, 2014.
Rights: fechado
Identifier DOI: 10.1016/j.physa.2014.02.004
Address: https://www.sciencedirect.com/science/article/pii/S0378437114000958
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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