Robust multipartite Bell tests with a single photon

Details Robust multipartite Bell tests with a single photon Robust multipartite Bell tests with a single photon

2012-02-14

arxiv.org/abs/1202.3049v1

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

Lately, much interest has been directed towards designing setups that achieve decisive tests of local realism. Here we present a Bell test based on the state of a single nonlocalised photon. The scheme is easily extendible to any number of observers, allowing observation of multipartite nonlocality, and has a good tolerance to loss, compatible with current efficiencies of detectors and single-photon sources. The required entangled state and measurements can be realized via linear optics and single-photon detection, facilitating experimental implementation of the scheme. We also consider the case of atom-photon entanglement, where the loss threshold can be lowered further, as well as local filters compensating transmission and coupling inefficiencies at the source.

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