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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Veröffentlicht in:Entropy (Basel, Switzerland) Jg. 23; H. 8; S. 925
Hauptverfasser: Cavalcanti, Eric G., Wiseman, Howard M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Basel MDPI AG 21.07.2021
MDPI
Schlagworte:
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
Online-Zugang:Volltext
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Zusammenfassung: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.
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ISSN:1099-4300
1099-4300
DOI:10.3390/e23080925