Violation of Bell's Inequality by a Generalized Einstein-Podolsky-Rosen State Using Homodyne Detection

A. Kuzmich; I. A. Walmsley; L. Mandel

doi:10.1103/PhysRevLett.85.1349

Violation of Bell's Inequality by a Generalized Einstein-Podolsky-Rosen State Using Homodyne Detection

A. Kuzmich, I. A. Walmsley, and L. Mandel

Phys. Rev. Lett. 85, 1349 – Published 14 August 2000

Abstract

Using homodyning with weak coherent fields and photon counting, we have observed violations of Bell-type inequalities by the generalized Einstein-Podolsky-Rosen state produced in a pulsed nondegenerate optical parametric amplifier, as predicted by Grangier et al. [Phys. Rev. A 38, 3132 (1988)]. The maximum observed visibility of the interference pattern was $(89 \pm 4) %$ . This interference can be regarded as a manifestation of nonlocality in the sense described by Banaszek and Wodkiewicz [Phys. Rev. A 58, 4345 (1998)]. We have investigated the interference both theoretically and experimentally and have measured the influence of dispersion and phase matching.

Received 30 August 1999

DOI:https://doi.org/10.1103/PhysRevLett.85.1349

Authors & Affiliations

A. Kuzmich¹, I. A. Walmsley², and L. Mandel¹

¹Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627
²Institute of Optics, University of Rochester, Rochester, New York 14627