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

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

2003-10-13

arxiv.org/abs/quant-ph/0310087v2

Phys. Rev. A 69, 022318 (2004)

Physics

Quantum Physics

10 pages, 8 figures

Scientific paper

10.1103/PhysRevA.69.022318

We study the evolution of purity, entanglement and total correlations of general two--mode Gaussian states of continuous variable systems 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.

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