Phys. Rev. Lett. 103, 180402 (2009) [4 pages]Testing for Multipartite Quantum Nonlocality Using Functional Bell InequalitiesReceived 29 May 2009; revised 11 September 2009; published 29 October 2009 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 URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.180402
DOI:
10.1103/PhysRevLett.103.180402
PACS:
03.65.Ud, 03.65.Ta, 03.67.Mn, 42.50.Dv
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.