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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evolution of a quantum harmonic oscillator coupled to a minimal thermal environment

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Author(s):
Vidiella-Barranco, A.
Total Authors: 1
Document type: Journal article
Source: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS; v. 459, p. 78-85, OCT 1 2016.
Web of Science Citations: 1
Abstract

In this paper it is studied the influence of a minimal thermal environment on the dynamics of a quantum harmonic oscillator (labelled A), prepared in a coherent state. The environment itself consists of a second oscillator (labelled B), initially in a thermal state. Two types of interaction Hamiltonians are considered, and the time-evolution of the reduced density operator of oscillator A is compared to the one obtained from the usual master equation approach, i.e., assuming that oscillator A is coupled to a large reservoir. An analysis of the linear entropy evolution of oscillator A shows that simplified models may be able to describe important features related to the phenomenon of decoherence, such as the rapid growth of the linear entropy, as well as its dependence on the effective temperature of the environment. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 08/57856-6 - National Institute of Science and Technology - Quantum Information
Grantee:Amir Ordacgi Caldeira
Support type: Research Projects - Thematic Grants
FAPESP's process: 05/51689-2 - Optics and Photonics Research Center at UNICAMP
Grantee:Hugo Luis Fragnito
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC