We experimentally demonstrate the nonclassical photon number correlations expected in tripartite continuous variable states obtained by parametric processes. Our scheme involves a single nonlinear crystal, where two interlinked parametric interactions take place simultaneously, and represents a bright and compact source of a sub-shot-noise tripartite light field. We analyze the effects of the pump intensities on the numbers of detected photons and on the amount of noise reduction in some details, thus demonstrating a good agreement between the experimental data and a single-mode theoretical description.
@article{arxiv.0810.4063,
title = {Demonstration of a bright and compact source of tripartite nonclassical light},
author = {Alessia Allevi and Maria Bondani and Matteo G. A. Paris and Alessandra Andreoni},
journal= {arXiv preprint arXiv:0810.4063},
year = {2009}
}