Characterization and quantification of symmetric Gaussian state entanglement through a local classicality criterion

Details Characterization and quantification of symmetric Gaussian state entanglement through a local classicality criterion Characterization and quantification of symmetric Gaussian state entanglement through a local classicality criterion

2004-01-10

arxiv.org/abs/quant-ph/0401055v3

Phys. Rev. A 72, 012317 (2005)

Physics

Quantum Physics

5 pages, 1 figure. Replaced with final published version

Scientific paper

10.1103/PhysRevA.72.012317

A necessary and sufficient condition for characterization and quantification of entanglement of any bipartite Gaussian state belonging to a special symmetry class is given in terms of classicality measures of one-party states. For Gaussian states whose local covariance matrices have equal determinants it is shown that separability of a two-party state and classicality of one party state are completely equivalent to each other under a nonlocal operation, allowing entanglement features to be understood in terms of any available classicality measure.

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