Highly nonclassical photon statistics in parametric down-conversion
Edo Waks, Barry Cyril Sanders, Eleni Diamanti, Y. Yamamoto · Physical Review A · 2006
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.