Experimental determination of a nonclassical Glauber-Sudarshan P function
Quantum Physics
2008-08-28 v2
Abstract
A quantum state is nonclassical if its Glauber-Sudarshan P function fails to be interpreted as a probability density. This quantity is often highly singular, so that its reconstruction is a demanding task. Here we present the experimental determination of a well-behaved P function showing negativities for a single-photon-added thermal state. This is a direct visualization of the original definition of nonclassicality. The method can be useful under conditions for which many other signatures of nonclassicality would not persist.
Cite
@article{arxiv.0804.1016,
title = {Experimental determination of a nonclassical Glauber-Sudarshan P function},
author = {T. Kiesel and W. Vogel and V. Parigi and A. Zavatta and M. Bellini},
journal= {arXiv preprint arXiv:0804.1016},
year = {2008}
}
Comments
4 pages, 4 figures