B. T. Kirby, J. D. Franson
A straightforward method for performing nonlocal interferometry using macroscopic coherent states is described. The required entanglement can be generated using weak nonlinearities while Bell's inequality can be violated using single photons as a probe. A large number of photons can be absorbed with only a small reduction in the visibility of the nonlocal interference, which may be of practical use in quantum communications in addition to being of fundamental interest.
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http://arxiv.org/abs/1207.5487
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