title: Observation of Young's double-slit interference with the three-photon N00N state.
abstract: Spatial interference of quantum mechanical particles exhibits a fundamental feature of quantum mechanics. A two-mode entangled state of N particles known as N00N state can give rise to non-classical interference. We report the first experimental observation of a three-photon N00N state exhibiting Young's double-slit type spatial quantum interference. Compared to a single-photon state, the three-photon entangled state generates interference fringes that are three times denser. Moreover, its interference visibility of 0.49 ± 0.09 is well above the limit of 0.1 for spatial super-resolution of classical origin.
authors.affiliation: Department of Physics, Pohang University of Science and Technology, Pohang,South Korea.
authors.forename: Yong-Su
authors.initials: YS
authors.lastname: Kim
authors.forename: Osung
authors.initials: O
authors.lastname: Kwon
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Lee
authors.forename: Jong-Chan
authors.initials: JC
authors.lastname: Lee
authors.forename: Heonoh
authors.initials: H
authors.lastname: Kim
authors.forename: Sang-Kyung
authors.initials: SK
authors.lastname: Choi
authors.forename: Hee Su
authors.initials: HS
authors.lastname: Park
authors.forename: Yoon-Ho
authors.initials: YH
authors.lastname: Kim
mesh_terms: D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D017785:Photons; D011789:Quantum Theory; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation