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

Preprint

27 February 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/0310087

Abstract

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.

Keywords

ENTANGLEMENT AND PURITY
MODE GAUSSIAN STATES
VON NEUMANN ENTROPY
MUTUAL INFORMATION
NOISY CHANNELS
EVOLUTION
PURITY

All Related Versions

Version 1, 2003-10-13, ArXiv
Version 2, 2004-02-27, ArXiv
Published version: Physical Review A, 69 (2), 022318.

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