Minimum detection efficiency for a loophole-free atom-photon Bell experiment

Details Minimum detection efficiency for a loophole-free atom-photon Bell experiment Minimum detection efficiency for a loophole-free atom-photon Bell experiment

2007-01-26

arxiv.org/abs/quant-ph/0701191v2

Phys. Rev. Lett. 98 (2007) 220402

Physics

Quantum Physics

REVTeX4, 4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.98.220402

In Bell experiments, one problem is to achieve high enough photodetection to ensure that there is no possibility of describing the results via a local hidden-variable model. Using the Clauser-Horne inequality and a two-photon non-maximally entangled state, a photodetection efficiency higher than 0.67 is necessary. Here we discuss atom-photon Bell experiments. We show that, assuming perfect detection efficiency of the atom, it is possible to perform a loophole-free atom-photon Bell experiment whenever the photodetection efficiency exceeds 0.50.

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