Minimum Detection Efficiencies for a Loophole-Free Bell-type Test
Quantum Physics
2015-05-14 v1 High Energy Physics - Phenomenology
Abstract
We discuss the problem of finding the most favorable conditions for closing the detection loophole in a test of local realism with a Bell inequality. For a generic non-maximally entangled two-qubit state and two alternative measurement bases we apply Hardy's proof of non-locality without inequality and derive an Eberhard-like inequality. For an infinity of non-maximally entangled states we find that it is possible to refute local realism by requiring perfect detection efficiency for only one of the two measurements: the test is free from the detection loophole for any value of the detection efficiency corresponding to the other measurement. The maximum tolerable noise in a loophole-free test is also evaluated.
Cite
@article{arxiv.0912.2258,
title = {Minimum Detection Efficiencies for a Loophole-Free Bell-type Test},
author = {G. Garbarino},
journal= {arXiv preprint arXiv:0912.2258},
year = {2015}
}
Comments
4 pages, 2 figures