Entanglement of Formation for Gaussian States

Details Entanglement of Formation for Gaussian States Entanglement of Formation for Gaussian States

2008-08-12

arxiv.org/abs/0808.1658v1

Physics

Quantum Physics

4 pages

Scientific paper

The entanglement of formation (EOF) is computed for arbitrary two-mode Gaussian states. Apart from a conjecture, our analysis rests on two main ingredients. The first is a four-parameter canonical form we develop for the covariance matrix, one of these parameters acting as a measure of EOF, and the second is a generalisation of the EPR correlation, used in the work of Giedke {\em et al} [Phys. Rev. Lett. {\bf 91}, 107901 (2003)], to noncommuting variables. The conjecture itself is in respect of an extremal property of this generalized EPR correlation.

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