title: Distinguishing genuine entangled two-photon-polarization sfrom independently generated pairs of entangled photons.
abstract: A scheme to distinguish entangled two-photon-polarization (ETP) states from two independent entangled one-photon-polarization (EOP) states is proposed. Using this scheme, the experimental generation of ETP by parametric down-conversion is confirmed through the anticorrelations among three orthogonal two-photon-polarization states. The estimated fraction of ETP among the correlated photon pairs is 37% in the present experimental setup.
authors.affiliation: Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan. tsujino@es.hokudai.ac.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Tsujino
authors.forename: Holger F
authors.initials: HF
authors.lastname: Hofmann
authors.forename: Shigeki
authors.initials: S
authors.lastname: Takeuchi
authors.forename: Keiji
authors.initials: K
authors.lastname: Sasaki