Quantum Physics
[Submitted on 11 Oct 2013 (v1), last revised 21 Feb 2014 (this version, v2)]
Title:Testing Bell's Inequality with Cosmic Photons: Closing the Setting-Independence Loophole
View PDFAbstract:We propose a practical scheme to use photons from causally disconnected cosmic sources to set the detectors in an experimental test of Bell's inequality. In current experiments, with settings determined by quantum random number generators, only a small amount of correlation between detector settings and local hidden variables, established less than a millisecond before each experiment, would suffice to mimic the predictions of quantum mechanics. By setting the detectors using pairs of quasars or patches of the cosmic microwave background, observed violations of Bell's inequality would require any such coordination to have existed for billions of years --- an improvement of 20 orders of magnitude.
Submission history
From: Andrew Friedman [view email][v1] Fri, 11 Oct 2013 20:48:04 UTC (938 KB)
[v2] Fri, 21 Feb 2014 19:56:21 UTC (1,006 KB)
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