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Against Identification of Contextuality with Violation of the Bell Inequalities: Lessons from Theory of Randomness
Linnaeus University, Faculty of Technology, Department of Mathematics. (Int Ctr Math Modeling Phys & Cognit Sci)ORCID iD: 0000-0002-9857-0938
2022 (English)In: Journal of Russian Laser Research, ISSN 1071-2836, E-ISSN 1573-8760, Vol. 43, no 1, p. 48-59Article in journal (Refereed) Published
Abstract [en]

Nowadays, contextuality is the hottest topic of quantum foundations and, especially, foundations of quantum information theory. This notion is characterized by the huge diversity of approaches and interpretations. One of the strongest trends in contextual research is to identify contextuality with Bell test contextuality (BTC). In this paper, we criticize the BTC approach. It can be compared with an attempt to identify the complex and theoretically nontrivial notion of randomness with a test for randomness (or a batch of tests, as the NIST test). We advertise Bohr contextuality taking into account all experimental conditions (context). In the simplest case, the measurement context of an observable A is reduced to joint measurement with a compatible observable B. The latter definition was originally considered by Bell in relation to his inequality. We call it joint measurement contextuality (JMC). Although JMC is based on the use of counterfactuals, by considering it within the general Bohr's framework, it is possible to handle JMC on physical grounds. We suggest (similarly to randomness) to certify JMC in experimental data with Bell tests, but only certify and not reduce.

Place, publisher, year, edition, pages
Springer, 2022. Vol. 43, no 1, p. 48-59
Keywords [en]
contextuality, Bell inequality, Bohr contextuality, randomness, tests for randomness, tests for contextuality
National Category
Atom and Molecular Physics and Optics Computational Mathematics
Research subject
Natural Science, Mathematics
Identifiers
URN: urn:nbn:se:lnu:diva-110773DOI: 10.1007/s10946-022-10022-9ISI: 000757171500002Scopus ID: 2-s2.0-85124743899Local ID: 2022OAI: oai:DiVA.org:lnu-110773DiVA, id: diva2:1643896
Available from: 2022-03-11 Created: 2022-03-11 Last updated: 2022-03-22Bibliographically approved

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Khrennikov, Andrei

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