title: Anisotropically and high entanglement of biphoton states generated in spontaneous parametric down-conversion.
abstract: We show both theoretically and experimentally that biphoton wave packets generated via spontaneous parametric down-conversion can be strongly anisotropic and highly entangled. The conditions under which these effects exist are found and discussed.
authors.affiliation: A.M. Prokhorov General Physics Institute of Russian Academy of Sciences, 117942, Moscow, Russia.
authors.forename: M V
authors.initials: MV
authors.lastname: Fedorov
authors.forename: M A
authors.initials: MA
authors.lastname: Efremov
authors.forename: P A
authors.initials: PA
authors.lastname: Volkov
authors.forename: E V
authors.initials: EV
authors.lastname: Moreva
authors.forename: S S
authors.initials: SS
authors.lastname: Straupe
authors.forename: S P
authors.initials: SP
authors.lastname: Kulik