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

Abstract

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.

REVTeX4, 4 pages, 1 figure

References in corpus (2)

• Detection loophole in asymmetric Bell experiments
• Bipartite Bell inequalities for hyperentangled states

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