Random 'choices' and the locality loophole

Abstract

It has been claimed that to close the locality loophole in a Bell experiment, random numbers of quantum origin should be used for selecting the measurement settings. This is how it has been implemented in all recent Bell experiment addressing this loophole. I point out in this note that quantum random number generators are unnecessary for such experiments and that a Bell experiment with a pseudo-random (but otherwise completely deterministic) mechanism for selecting the measurement settings, such as taking a hash function of the latest million tweets with the hashtag #quantum, would be as convincing, or even more, than one using quantum random number generators.

This note is based on a talk I gave at the GISIN'14 workshop in September 2014 and at the Randomness in Quantum Physics and Beyond conference in May 2015

References in corpus (1)

• The Communication Cost of Simulating Bell Correlations

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• Bell inequality violation on small NISQ computers