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Comment on “The Notion of Locality in Relational Quantum Mechanics”

Phys. Rev. A 101, 012104 – Published 8 January 2020
Pienaar, J. International Institute of Physics (Universidade Federal do Rio Grande do Norte) 2020 Physics

A recent paper (Martin-Dussaud et al. in Found Phys 49:96, 2019) has given a lucid treatment of Bell’s notion of local causality within the framework of the relational interpretation of quantum mechanics. However, the authors went on to conclude that the quantum violation of Bell’s notion of local causality is no more surprising than a common cause. Here, I argue that this conclusion is unwarranted by the authors’ own analysis. On the contrary, within the framework outlined by the authors, I argue that far from saving the notion of ‘locality’ from the grip of Bell’s theorem, the authors have deprived it of a meaningful definition.

The article was published in: Foundations of Physics volume 49, pages1404–1414 - Published: 23 October 2019

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This work was supported (in part) by the Fetzer Franklin Fund of the John E. Fetzer Memorial Trust.