Moments of nonclassicality quasiprobabilities
arXiv:1201.0861 · doi:10.1103/PhysRevA.85.043827
Abstract
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.
6 pages, 3 figures
References in corpus (9)
- Entanglement detection
- Experimental nonclassicality of single-photon-added thermal light states
- Testing nonclassicality in multimode fields: a unified derivation of classical inequalities
- Quasi-probability representations of quantum theory with applications to quantum information science
- Nonclassical correlation properties of radiation fields
- Universal measurement of quantum correlations of radiation
- Nonclassicality Quasiprobability of Single-Photon Added Thermal States
- Direct Sampling of Negative Quasiprobabilities of a Squeezed State
- Measuring microwave quantum states: tomogram and moments