Moments of nonclassicality quasiprobabilities

Details Moments of nonclassicality quasiprobabilities Moments of nonclassicality quasiprobabilities

2012-01-04

arxiv.org/abs/1201.0861v1

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

A method is introduced for the verification of nonclassicality in terms of moments of nonclassicality quasiprobability distributions. The latter are easily obtained from experimental data and will be denoted as nonclassicality moments. Their relation to normally-ordered moments is derived, which enables us to verify nonclassicality by using well established criteria. Alternatively, nonclassicality criteria are directly formulated in terms of nonclassicality moments. The latter converge in proper limits to the usually used criteria, as is illustrated for squeezing and sub-Poissonian photon statistics. Our theory also yields expectation values of any observable in terms of nonclassicality moments.

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