Witnessing Entanglement of EPR States With Second-Order Interference

Details Witnessing Entanglement of EPR States With Second-Order Interference Witnessing Entanglement of EPR States With Second-Order Interference

2005-08-19

arxiv.org/abs/quant-ph/0508146v2

International Journal of Modern Physics B 20, 1504, (2006)

Physics

Quantum Physics

9 pages, 5 figures

Scientific paper

10.1142/S021797920603408X

The separability of the continuous-variable EPR state can be tested with Hanbury-Brown and Twiss type interference. The second-order visibility of such interference can provide an experimental test of entanglement. It is shown that time-resolved interference leads to the Hong, Ou and Mandel deep, that provides a signature of quantum non-separability for pure and mixed EPR states. A Hanbury-Brown and Twiss type witness operator can be constructed to test the quantum nature of the EPR entanglement.

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