Bell tests for collider decay processes

Abstract:We propose Bell tests for collider decays using independently sampled analysis axes as settings and detector regions to assign binary or null outcomes. We show that a Bell violation requires postselection, opening a loophole. However, under measurement independence and operational equivalence of acceptance events across settings, any local model exploiting the loophole must be nonclassical in the sense of measurement contextuality. We derive a Bell inequality violated by singlet correlations when the effective spin-analyzing powers are sufficiently high. Its violation then witnesses Bell nonlocality or measurement contextuality.

8 pages, 1 figure. Includes End Matter

arXiv:2609.09294 [quant-ph]

(or arXiv:2609.09294v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.09294 Focus to learn more arXiv-issued DOI via DataCite

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