| Full text | |
| Author(s): |
Vidiella-Barranco, A.
Total Authors: 1
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| 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: | 05/51689-2 - Optics and Photonics Research Center at UNICAMP |
| Grantee: | Hugo Luis Fragnito |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 08/57856-6 - National Institute of Science and Technology - Quantum Information |
| Grantee: | Amir Ordacgi Caldeira |
| Support Opportunities: | Research Projects - Thematic Grants |