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arXiv:quant-ph/0602118 · Physical Review A

Highly nonclassical photon statistics in parametric down-conversion

Edo Waks A, Barry C. Sanders, Eleni Diamanti, Y. Yamamoto

Published Mar 20, 2006• 43 citations
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Abstract

We use photon counters to obtain the joint photon-counting statistics from twin-beam nondegenerate parametric down-conversion, and we demonstrate directly, and with no auxiliary assumptions, that these twin beams are nonclassical.
DOI
10.1103/physreva.73.033814

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Parametric down-conversion (PDC) is a technique of ubiquitous experimental significance in the production of nonclassical, photon-number-correlated twin beams. Standard theory of PDC as a two-mode squeezing process predicts and homodyne measurements observe a thermal photon number distribution per beam. Recent experiments have obtained conflicting distributions. In this article, we explain the observation by an a priori theoretical model solely based on directly accessible physical quantities. We compare our predictions with experimental data and find excellent agreement.