title: Realization of Hardy's thought experiment with photons.
abstract: We present an experimental realization of Hardy's thought experiment [Phys. Rev. Lett. 68, 2981 (1992)], using photons. The experiment consists of a pair of Mach-Zehnder interferometers that interact through photon bunching at a beam splitter. A striking contradiction is created between the predictions of quantum mechanics and local hidden variables. The contradiction relies on nonmaximally entangled position states of two particles. A Clauser-Horne-type inequality is derived and violated.
authors.affiliation: Department of Physics, University of California, Santa Barbara, CA 93106, USA. william@physics.ucsb.edu
authors.forename: William T M
authors.initials: WT
authors.lastname: Irvine
authors.forename: Juan F
authors.initials: JF
authors.lastname: Hodelin
authors.forename: Christoph
authors.initials: C
authors.lastname: Simon
authors.forename: Dirk
authors.initials: D
authors.lastname: Bouwmeester