General mapping of multi-quit entanglement conditions to non-separability indicators for quantum optical fields
arXiv:1903.03526 · doi:10.1103/PhysRevResearch.1.032041
Abstract
We show that any multi-qudit entanglement witness leads to a non-separability indicator for quantum optical fields, which involves intensity correlations. We get, e.g., necessary and sufficient conditions for intensity or intensity-rate correlations to reveal polarization entanglement. We also derive separability conditions for experiments involving multiport interferometers, now feasible with integrated optics. We show advantages of using intensity rates rather than intensities, e.g., a mapping of Bell inequalities to ones for optical fields. The results have implication for studies of non-classicality of "macroscopic" systems of undefined or uncontrollable number of "particles".
arXiv comment15 pages, 3 figures, published version
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