Random 'choices' and the locality loophole

TL;DR

The paper argues that quantum random number generators are not essential for closing the locality loophole in Bell experiments, suggesting deterministic pseudo-random mechanisms could suffice and be equally convincing.

Contribution

It challenges the necessity of quantum randomness in Bell tests, proposing deterministic pseudo-random methods as valid alternatives.

Findings

Pseudo-random mechanisms can replace quantum randomness in Bell experiments.

Deterministic methods can effectively close the locality loophole.

Quantum random number generators are not strictly necessary for convincing Bell tests.

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.