Proposal for a loophole-free Bell test using homodyne detection

We propose a feasible optical setup allowing for a loophole-free Bell test with efficient homodyne detection. A non-Gaussian entangled state is generated from a two-mode squeezed vacuum by subtracting a single photon from each mode, using beam splitters and standard low-efficiency single-photon dete...

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Bibliographic Details
Published inPhysical review letters Vol. 93; no. 13; p. 130409
Main Authors García-Patrón, R, Fiurásek, J, Cerf, N J, Wenger, J, Tualle-Brouri, R, Grangier, Ph
Format Journal Article
LanguageEnglish
Published United States 24.09.2004
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Summary:We propose a feasible optical setup allowing for a loophole-free Bell test with efficient homodyne detection. A non-Gaussian entangled state is generated from a two-mode squeezed vacuum by subtracting a single photon from each mode, using beam splitters and standard low-efficiency single-photon detectors. A Bell violation exceeding 1% is achievable with 6 dB squeezed light and a homodyne efficiency around 95%. A detailed feasibility analysis, based upon the recent experimental generation of single-mode non-Gaussian states, suggests that this method opens a promising avenue towards a complete experimental Bell test.
ISSN:0031-9007
DOI:10.1103/physrevlett.93.130409