Entanglement oscillations in non-Markovian quantum channels

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.062119· OSTI ID:20991083

Maniscalco, Sabrina ^[1]; Olivares, Stefano ^[2]; Paris, Matteo G. A. ^[3]

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1. Department of Physics, University of Turku, FI-20014 Turku (Finland)
2. Dipartimento di Fisica dell'Universita di Milan, I-20133 (Italy)
3. Dipartimento di Fisica dell'Universita di Milano, I-20133 (Italy)

We study the non-Markovian dynamics of a two-mode bosonic system interacting with two uncorrelated thermal bosonic reservoirs. We present the solution to the exact microscopic Master equation in terms of the quantum characteristic function and study in detail the dynamics of entanglement for bipartite Gaussian states. In particular, we analyze the effects of short-time system-reservoir correlations on the separability thresholds and show that the relevant parameter is the reservoir spectral density. If the frequencies of the involved modes are within the reservoir spectral density, entanglement persists for a longer time than in a Markovian channel. On the other hand, when the reservoir spectrum is out of resonance, short-time correlations lead to a faster decoherence and to the appearance of entanglement oscillations.

• OSTI ID: 20991083
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
CORRELATIONS
MARKOV PROCESS
MATHEMATICAL SOLUTIONS
OSCILLATIONS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
RESONANCE
SPECTRA
SPECTRAL DENSITY