Witnessing Entanglement of EPR States With Second-Order Interference
arXiv:quant-ph/0508146 · doi:10.1142/S021797920603408X
Abstract
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.
arXiv comment9 pages, 5 figures
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