Proposal for loophole-free Bell test using homodyne detection

Proposal for 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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Veröffentlicht in:Physical review letters 2004-01, Vol.734 (13), p.265-268
Hauptverfasser: Garcia-Patron, R, Fiura, J, Cerf, N J
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Quantum Physics
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Fiura, J
Cerf, N J
description 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 of squeezing, a photodetector efficiency around 10%, and an homodyne efficiency around 95%. A feasibility analysis, based upon the recent generation of single-mode non-Gaussian states via photon subtraction, suggests that this method opens a promising avenue towards a complete experimental Bell test.
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subjects Physics
Quantum Physics
title Proposal for loophole-free Bell test using homodyne detection
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