preprints.org > physical sciences > quantum science and technology > doi: 10.20944/preprints202308.0018.v2

Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 27 July 2023 / Approved: 31 July 2023 / Online: 1 August 2023 (11:05:59 CEST)
Version 2 : Received: 1 August 2023 / Approved: 2 August 2023 / Online: 3 August 2023 (08:31:18 CEST)

The quantum Randi challenge is an invitation to violate Bell’s inequality with a programmable (transparent and reproducible) sequence of local events. This is widely perceived as impossible, given Bell’s Theorem. However, mathematical proofs can be correct without universal validity, as seen in the case of Euclidean geometry. Is Bell’s Locality Criterion inclusive enough to account for all the local phenomena? It is well known that Bell-type inequalities apply to jointly distributed variables, meaning that they hold for events that can be recorded at the same time. Yet, some physical qualities are mutually exclusive. They only become observable at different times. Accordingly, pairwise detections in a narrow window of coincidence – but not at the same exact time – allow for maximal Bell violations (S=4 for the CHSH inequality), without room for doubt about the local nature of the process.

quantum entanglement; Bell’s theorem; nonlocality; correlation analysis; quantum Randi challenge.

Physical Sciences, Quantum Science and Technology

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