Implications of Local Friendliness Violation for Quantum Causality

We provide a new formulation of the Local Friendliness no-go theorem of Bong et al. [Nat. Phys. 16, 1199 (2020)] from fundamental causal principles, providing another perspective on how it puts strictly stronger bounds on quantum reality than Bell’s theorem. In particular, quantum causal models have...

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Vydané v:	Entropy (Basel, Switzerland) Ročník 23; číslo 8; s. 925
Hlavní autori:	Cavalcanti, Eric G., Wiseman, Howard M.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Basel MDPI AG 21.07.2021 MDPI
Predmet:	Camps causal models Causality experimental metaphysics Principles quantum causal models quantum causality quantum foundations Quantum mechanics Quantum theory Relativity Spacetime Theorems Theory of relativity Violations Wigner’s friend paradox
ISSN:	1099-4300, 1099-4300
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Shrnutí:	We provide a new formulation of the Local Friendliness no-go theorem of Bong et al. [Nat. Phys. 16, 1199 (2020)] from fundamental causal principles, providing another perspective on how it puts strictly stronger bounds on quantum reality than Bell’s theorem. In particular, quantum causal models have been proposed as a way to maintain a peaceful coexistence between quantum mechanics and relativistic causality while respecting Leibniz’s methodological principle. This works for Bell’s theorem but does not work for the Local Friendliness no-go theorem, which considers an extended Wigner’s Friend scenario. More radical conceptual renewal is required; we suggest that cleaving to Leibniz’s principle requires extending relativity to events themselves.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	1099-4300 1099-4300
DOI:	10.3390/e23080925