title: Direct observation of nonclassical photon statistics in parametric down-conversion.
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.
authors.affiliation: Quantum Entanglement Project, ICORP, JST, E. L. Ginzton Laboratories, Stanford University, Stanford, California 94305, USA.
authors.forename: Edo
authors.initials: E
authors.lastname: Waks
authors.forename: Eleni
authors.initials: E
authors.lastname: Diamanti
authors.forename: Barry C
authors.initials: BC
authors.lastname: Sanders
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Bartlett
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Yamamoto