Abstract
We employ a high quantum efficiency photon number counter to determine the photon number distribution of the output field from a parametric down-converter. The raw photocount data directly demonstrates that the source is nonclassical by 40 standard deviations, and correcting for the quantum efficiency yields a direct observation of oscillations in the photon number distribution.
- Received 22 July 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.113602
©2004 American Physical Society