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 in:	Physical review letters Vol. 93; no. 13; pp. 130409.1 - 130409.4
Main Authors:	GARCIA-PATRON, R, FIURASEK, J, CERF, N. J, WENGER, J, TUALLE-BROURI, R, GRANGIER, Ph
Format:	Journal Article
Language:	English
Published:	Ridge, NY American Physical Society 24-09-2004
Subjects:	Classical and quantum physics: mechanics and fields Exact sciences and technology Fundamental areas of phenomenology (including applications) Nonclassical field states; squeezed, antibunched and sub-poissonian states; operational definitions of the phase of the field; phase measurements Optics Physics Quantum mechanics Quantum optics Homodyne detection Entangled states Bell inequality Violations
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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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.93.130409