Quantifying nonclassicality by characteristic functions
Quantum Physics
2017-05-18 v2
Abstract
In this paper, we use the characteristic function, i.e., the Fourier transform of the Glauber-Sudarshan phase-space distribution, to find the degree of nonclassicality of a given state. This degree of nonclassicality quantifies the nonclassicality in terms of quantum superpositions. We demonstrate two ways to determine or to estimate the degree of nonclassicality by studying the properties of the characteristic functions. The developed criteria are applied to two examples of squeezed states undergoing a classical mixing or a nonclassical superposition with vacuum.
Keywords
Cite
@article{arxiv.1702.00213,
title = {Quantifying nonclassicality by characteristic functions},
author = {S. Ryl and J. Sperling and W. Vogel},
journal= {arXiv preprint arXiv:1702.00213},
year = {2017}
}
Comments
13 pages, 6 figures