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

Serafini, Alessio; Illuminati, Fabrizio; Paris, Matteo G. A.; De Siena, Silvio

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

Authors

Description

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.
10 pages, 8 figures