Comment on `The notion of locality in relational quantum mechanics'

Abstract

A recent paper [P. Martin-Dussaud, C. Rovelli, F. Zalamea, arXiv:1806.08150] 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 the implications of the relational interpretation are much more radical.

arXiv comment5 pages, 2 figures, 1 murder

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• Relational Quantum Mechanics
• The lesson of causal discovery algorithms for quantum correlations: Causal explanations of Bell-inequality violations require fine-tuning
• Quantum causal modelling
• Theory-independent limits on correlations from generalised Bayesian networks
• A graph-separation theorem for quantum causal models
• Operational formulation of time reversal in quantum theory
• Observer-dependent locality of quantum events
• The notion of locality in relational quantum mechanics
• A Lenient Causal Arrow of Time?

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