Test of nonlocality for a continuos-variable state based on arbitrary number of measurement outcomes

Details Test of nonlocality for a continuos-variable state based on arbitrary number of measurement outcomes Test of nonlocality for a continuos-variable state based on arbitrary number of measurement outcomes

2006-02-14

arxiv.org/abs/quant-ph/0602119v2

Phys. Rev. Lett. 97, 110401 (2006)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.97.110401

We propose a scheme to test Bell's inequalities for an arbitrary number of measurement outcomes on entangled continuous variable states. The Bell correlation functions are expressible in terms of phase-space quasiprobability functions with complex ordering parameter, which can experimentally be determined both directly via local CV-qubit interaction or indirectly via tomographic reconstructions. We demonstrate that continuous-variable systems can give stronger violations of these Bell's inequalities than of the ones developed for two-outcome observables. Thus, while keeping the feasibility of the phase-space approach, our scheme increases its efficiency.

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