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Evolution of a quantum harmonic oscillator coupled to a minimal thermal environment | | A. Vidiella-Barranco
; | | Date: |
3 May 2016 | | 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. | | Source: | arXiv, 1605.1050 | | Services: | Forum | Review | PDF | Favorites | |
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