Test of Nonlocality for a Continuous-Variable State Based on an Arbitrary Number of Measurement Outcomes

W. Son, Č. Brukner, and M. S. Kim
Phys. Rev. Lett. 97, 110401 – Published 11 September 2006

Abstract

We propose a scheme to test Bell’s inequalities for an arbitrary number of measurement outcomes on entangled continuous-variable (CV) states. The Bell correlation functions are expressible in terms of phase-space quasiprobability functions with complex ordering parameters, which can experimentally be determined via a local CV-qubit interaction. We demonstrate that CV systems can give higher violations of these Bell’s inequalities than of the ones developed for two-outcome observables.

  • Figure
  • Received 20 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.110401

©2006 American Physical Society

Authors & Affiliations

W. Son1,2, Č. Brukner3,4, and M. S. Kim1

  • 1School of Mathematics and Physics, The Queen’s University, Belfast BT7 1NN, United Kingdom
  • 2The School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom
  • 3Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A–1090 Wien, Austria
  • 4Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Boltzmanngasse 3, A–1090 Wien, Austria

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Issue

Vol. 97, Iss. 11 — 15 September 2006

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