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Parallel Lives: A Local-Realistic Interpretation of “Nonlocal” Boxes

Département d’informatique et de recherche opérationnelle, Université de Montréal, Montréal, QC H3C 3J7, Canada
Canadian Institute for Advanced Research, Toronto, ON M5G 1M1, Canada
Authors to whom correspondence should be addressed.
Entropy 2019, 21(1), 87;
Received: 1 July 2018 / Revised: 10 January 2019 / Accepted: 11 January 2019 / Published: 18 January 2019
(This article belongs to the Special Issue Quantum Nonlocality)
PDF [6061 KB, uploaded 23 January 2019]


We carry out a thought experiment in an imaginary world. Our world is both local and realistic, yet it violates a Bell inequality more than does quantum theory. This serves to debunk the myth that equates local realism with local hidden variables in the simplest possible manner. Along the way, we reinterpret the celebrated 1935 argument of Einstein, Podolsky and Rosen, and come to the conclusion that they were right in their questioning the completeness of the Copenhagen version of quantum theory, provided one believes in a local-realistic universe. Throughout our journey, we strive to explain our views from first principles, without expecting mathematical sophistication nor specialized prior knowledge from the reader. View Full-Text
Keywords: Bell’s theorem; Einstein–Podolsky–Rosen argument; local hidden variables; local realism; no-signalling; parallel lives Bell’s theorem; Einstein–Podolsky–Rosen argument; local hidden variables; local realism; no-signalling; parallel lives

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Brassard, G.; Raymond-Robichaud, P. Parallel Lives: A Local-Realistic Interpretation of “Nonlocal” Boxes. Entropy 2019, 21, 87.

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