Testing for Multipartite Quantum Nonlocality Using Functional Bell Inequalities

Details Testing for Multipartite Quantum Nonlocality Using Functional Bell Inequalities Testing for Multipartite Quantum Nonlocality Using Functional Bell Inequalities

2009-11-13

arxiv.org/abs/0911.2532v1

Phys. Rev. Lett. 103, 180402 (2009)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.103.180402

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 optimising 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.

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