Generating optimal states for a homodyne Bell test

Details Generating optimal states for a homodyne Bell test Generating optimal states for a homodyne Bell test

2005-04-12

arxiv.org/abs/quant-ph/0504084v1

Phys. Rev. A 72, 032509 (2005)

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.72.034101

We present a protocol that produces a conditionally prepared state that can be used for a Bell test based on homodyne detection. Based on the results of Munro [PRA 1999], the state is near-optimal for Bell-inequality violations based on quadrature-phase homodyne measurements that use correlated photon-number states. The scheme utilizes the Gaussian entanglement distillation protocol of Eisert et. al. [Annals of Phys. 2004] and uses only beam splitters and photodetection to conditionally prepare a non-Gaussian state from a source of two-mode squeezed states with low squeezing parameter, permitting a loophole-free test of Bell inequalities.

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