Different operational meanings of continuous variable Gaussian entanglement criteria and Bell inequalities

Abstract

Entanglement, one of the most intriguing aspects of quantum mechanics, marks itself into different features of quantum states. For this reason different criteria can be used for verifying entanglement. In this paper we review some of the entanglement criteria casted for continuous variable states and link them to peculiar aspects of the original debate on the famous EPR paradox. Moreover, we give a handy expression for valuating Bell-type non-locality on Gaussian states. We also present the experimental measurement of a particular realization of the Bell operator over continuous variable entangled states produced by a sub-threshold type-II OPO.

The journal version is slightly different in the list of References and in a few sentences

References in corpus (6)

• Steering, Entanglement, Nonlocality, and the EPR Paradox
• Observation of one-way Einstein-Podolsky-Rosen steering
• Determination of continuous variable entanglement by purity measurements
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• Experimental analysis of decoherence of quantumness in a continuous variables bi-partite entangled system
• Transmittivity measurements by means of squeezed vacuum light