Quasiprobabilities for Multipartite Quantum Correlations of Light
Quantum Physics
2013-03-15 v2
Abstract
Regular quasiprobabilities are introduced for the aim of characterizing quantum correlations of multimode radiation fields. Negativities of these quantum-correlation quasiprobabilities are necessary and sufficient for any quantum correlation encoded in the multimode Glauber-Sudarshan P function. The strength of the method is demonstrated for a two-mode phase randomized squeezed-vacuum state. It has no entanglement, no quantum discord, a positive Wigner function, and a classical reduced single-mode representation. Our method clearly visualizes the quantum correlations of this state.
Cite
@article{arxiv.1211.1585,
title = {Quasiprobabilities for Multipartite Quantum Correlations of Light},
author = {E. Agudelo and J. Sperling and W. Vogel},
journal= {arXiv preprint arXiv:1211.1585},
year = {2013}
}
Comments
7 pages, 3 figures