A scheme for direct observation of entanglement for Gaussian continuous variables

Details A scheme for direct observation of entanglement for Gaussian continuous variables A scheme for direct observation of entanglement for Gaussian continuous variables

2002-03-29

arxiv.org/abs/quant-ph/0203151v1

modified version appeas in Phys. Rev. A66 030301(Rapid Comm) (2002)

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

We suggest an experimentally realizable scheme to test entanglement of a mixed Gaussian continuous variable state. We find that the entanglement condition is simplified for the family of Gaussian states which are relevant to experimental realization. The entanglement condition is then shown to be directly related to joint homodyne measurements. We show how robust the proposed test of entanglement is against imperfect detection efficiency.

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