Efficient quantification of non-Gaussian spin distributions
Quantum Physics
2013-04-22 v1
Abstract
We study theoretically and experimentally the quantification of non-Gaussian distributions via non-destructive measurements. Using the theory of cumulants, their unbiased estimators, and the uncertainties of these estimators, we describe a quantification which is simultaneously efficient, unbiased by measurement noise, and suitable for hypothesis tests, e.g., to detect non-classical states. The theory is applied to cold Rb spin ensembles prepared in non-gaussian states by optical pumping and measured by non-destructive Faraday rotation probing. We find an optimal use of measurement resources under realistic conditions, e.g., in atomic ensemble quantum memories.
Cite
@article{arxiv.1112.3814,
title = {Efficient quantification of non-Gaussian spin distributions},
author = {B. Dubost and M. Koschorreck and M. Napolitano and N. Behbood and R. J. Sewell and M. W. Mitchell},
journal= {arXiv preprint arXiv:1112.3814},
year = {2013}
}