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Comment on “Consequences of the single-pair measurement of the Bell parameter”

Marian Kupczynski*

  • Département de l’Informatique et Technologie, UQO, Case Postale 1250, Succursale Hull, Gatineau, Quebec, Canada J8X3X7

  • *Contact author: marian.kupczynski@uqo.ca
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Phys. Rev. A 112, 066201 – Published 5 December, 2025

DOI: https://doi.org/10.1103/hvm8-wtvz

Abstract

Genovese and Piacentini [Phys. Rev. A 111, 022204 (2025)] claim that, in a recent experiment [S. Virzì et al., Quantum Sci. Technol. 9, 045027 (2024)], the Bell parameter was measured on a single pair of photons, thus challenging several conclusions and discussions on the meaning of Bell inequalities as well as certain quantum mechanical interpretations. We explain that the parameter measured in the experiment of Virzì et al. is not the Bell parameter S, which has been discussed and estimated in many loophole-free tests. Therefore, this experiment neither challenges our understanding of Bell tests nor allows having doubts about Bohr complementarity and contextuality.

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Comments & Replies

Reply to “Comments on ‘Consequences of the single-pair measurement of the Bell parameter' ”

Marco Genovese and Fabrizio Piacentini
Phys. Rev. A 112, 066203 (2025)

Comment on “Consequences of the single-pair measurement of the Bell parameter”

Justo Pastor Lambare
Phys. Rev. A 112, 066202 (2025)

Article Text

Original Article

Consequences of the single-pair measurement of the Bell parameter

Marco Genovese and Fabrizio Piacentini
Phys. Rev. A 111, 022204 (2025)

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Outline

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Phys. Rev. A 112, 066201– Published 5 December, 2025
  • Received 9 February 2025
  • Accepted 30 October 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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