title: Nonlinear interferometry via Fock-state projection.
abstract: We use a photon-number-resolving detector to monitor the photon-number distribution of the output of an interferometer, as a function of phase delay. As inputs we use coherent states with mean photon number up to seven. The postselection of a specific Fock (photon-number) state effectively induces high-order optical nonlinearities. Following a scheme by Bentley and Boyd [Opt. Express 12, 5735 (2004).10.1364/OPEX.12.005735], we explore this effect to demonstrate interference patterns a factor of 5 smaller than the Rayleigh limit.
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106, USA. khoury@physics.ucsb.edu
authors.forename: G
authors.initials: G
authors.lastname: Khoury
authors.forename: H S
authors.initials: HS
authors.lastname: Eisenberg
authors.forename: E J S
authors.initials: EJ
authors.lastname: Fonseca
authors.forename: D
authors.initials: D
authors.lastname: Bouwmeester