Entanglement and purity of two-mode Gaussian states in noisy channels

Journal Article · Sun Feb 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.022318· OSTI ID:20640710

Serafini, Alessio; Illuminati, Fabrizio; De Siena, Silvio ^[1]; Paris, Matteo G.A. ^[2]

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1. Dipartimento di Fisica 'E. R. Caianiello', Universita di Salerno, INFM UdR Salerno, INFN Sezione di Napoli, Gruppo Collegato Salerno, Via S. Allende, 84081 Baronissi, SA (Italy)
2. Dipartimento di Fisica, Universita di Milano, Milan (Italy)

We study the evolution of purity, entanglement, and total correlations of general two-mode continuous variable Gaussian states in arbitrary uncorrelated Gaussian environments. The time evolution of purity, von Neumann entropy, logarithmic negativity, and mutual information is analyzed for a wide range of initial conditions. In general, we find that a local squeezing of the bath leads to a faster degradation of purity and entanglement, while it can help to preserve the mutual information between the modes.

• OSTI ID: 20640710
• Journal Information: Physical Review. A, Vol. 69, Issue 2; Other Information: DOI: 10.1103/PhysRevA.69.022318; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
ENERGY LEVELS
ENTROPY
EVOLUTION
GAUSS FUNCTION
GAUSSIAN PROCESSES
INFORMATION
QUANTUM MECHANICS