Home | About Journal | Web Links | E-mail Alerts | RSS RSS Icon | Browse
Previous Article Next Article

Testing for Multipartite Quantum Nonlocality Using Functional Bell Inequalities

Source: Phys. Rev. Lett. 103, 180402 (2009); doi:10.1103/PhysRevLett.103.180402

Published 29 October 2009

PACS
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 03.65.Ta
    Foundations of quantum mechanics; measurement theory
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • YEAR: 2009
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Q. Y. He,1 E. G. Cavalcanti,2 M. D. Reid,1 and P. D. Drummond1
1Centre for Quantum-Atom Optics, Swinburne University of Technology, Melbourne, Australia
2Centre for Quantum Dynamics, Griffith University, Brisbane QLD 4111, Australia
We show that arbitrary functions of continuous variables, e.g., position and momentum, can be used to generate tests that distinguish quantum theory from local hidden variable theories. By optimizing these functions, we obtain more robust violations of local causality than obtained previously. We analytically calculate the optimal function and include the effect of nonideal detectors and noise, revealing that optimized functional inequalities are resistant to standard forms of decoherence. These inequalities could allow a loophole-free Bell test with efficient homodyne detection. ©2009 The American Physical Society
History: Received 29 May 2009; revised 11 September 2009; published 29 October 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e180402
ADVERTISEMENT