Two experiments using entangled photons have successfully generated more randomness than consumed — at a level of security that is all but certain. They did so by exploiting non-locality, one of the most counterintuitive aspects of quantum mechanics.
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Skrzypczyk, P. Predictably random. Nat. Phys. 17, 431–432 (2021). https://doi.org/10.1038/s41567-021-01177-4
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