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Entanglement dynamics in presence of diversity under decohering environments

AuthorsGalve, Fernando CSIC ORCID CVN; Giorgi, Gian Luca CSIC ORCID ; Zambrini, Roberta CSIC ORCID
Issue DateFeb-2010
AbstractWe study the evolution of entanglement of a pair of coupled, non-resonant harmonic oscillators in contact with an environment. For both the cases of a common bath and of two separate baths for each of the oscillators, a full master equation is provided without rotating wave approximation. This allows us to characterize the entanglement dynamics as a function of the diversity between the oscillators frequencies and their mutual coupling. Also the correlation between the occupation numbers is considered to explore the degree of quantumness of the system. The singular effect of the resonance condition (identical oscillators) and its relationship with the possibility of preserving asymptotic entanglement are discussed. The importance of the bath's memory properties is investigated by comparing Markovian and non-Markovian evolutions.
Description12 pages, 7 figures, 1 appendix.
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