title: Realization of the Einstein-Podolsky-Rosen paradox using momentum- and position-entangled photons from spontaneous parametric down conversion.
abstract: We report on a momentum-position realization of the EPR paradox using direct detection in the near and far fields of the photons emitted by collinear type-II phase-matched parametric down conversion. Using this approach we achieved a measured two-photon momentum-position variance product of 0.01 variant Planck's over 2pi (2), which dramatically violates the bounds for the EPR and separability criteria.
authors.affiliation: Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
authors.forename: John C
authors.initials: JC
authors.lastname: Howell
authors.forename: Ryan S
authors.initials: RS
authors.lastname: Bennink
authors.forename: Sean J
authors.initials: SJ
authors.lastname: Bentley
authors.forename: R W
authors.initials: RW
authors.lastname: Boyd