Entanglement dynamics of nonidentical oscillators under decohering environments

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.062117· OSTI ID:21407899

Galve, Fernando; Giorgi, Gian Luca; Zambrini, Roberta ^[1]

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1. IFISC (UIB-CSIC), Instituto de Fisica Interdisciplinar y Sistemas Complejos, UIB Campus, E-07122 Palma de Mallorca (Spain)

We study the evolution of entanglement for a pair of coupled nonidentical harmonic oscillators in contact with an environment. For both 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. The entanglement dynamics is analyzed as a function of the diversity between the oscillators' frequencies and their positive or negative mutual coupling and also the correlation between the occupation numbers. 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.

• OSTI ID: 21407899
• Journal Information: Physical Review. A, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevA.81.062117; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
ASYMPTOTIC SOLUTIONS
CORRELATIONS
COUPLING
EQUATIONS
EVOLUTION
FUNCTIONS
HARMONIC OSCILLATORS
MARKOV PROCESS
OSCILLATORS
QUANTUM ENTANGLEMENT
RESONANCE
CALCULATION METHODS
ELECTRONIC EQUIPMENT
EQUIPMENT
MATHEMATICAL SOLUTIONS
STOCHASTIC PROCESSES