Test of Nonlocality for a Continuous-Variable State Based on an Arbitrary Number of Measurement Outcomes
Wonmin Son, Časlav Brukner, M. S. Kim · Physical Review Letters · 2006
We propose a scheme to test Bell's inequalities for an arbitrary number of measurement outcomes on entangled continuous-variable (CV) states. The Bell correlation functions are expressible in terms of phase-space quasiprobability functions with complex ordering parameters, which can experimentally be determined via a local CV-qubit interaction. We demonstrate that CV systems can give higher violations of these Bell's inequalities than of the ones developed for two-outcome observables.