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Stable Facts, Relative Facts

Di Biagio, Andrea and Rovelli, Carlo (2021) Stable Facts, Relative Facts. Foundations of Physics, 51 (30). ISSN 1572-9516

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Facts happen at every interaction, but they are not absolute: they are relative to the systems involved in the interaction. Stable facts are those whose relativity can effec-tively be ignored. In this work, we describe how stable facts emerge in a world of relative facts and discuss their respective roles in connecting quantum theory and the world. The distinction between relative and stable facts resolves the difficulties pointed out by the no-go theorem of Frauchiger and Renner, and is consistent with the experimental violation of the Local Friendliness inequalities of Bong et al.. Basing the ontology of the theory on relative facts clarifies the role of decoherence in bringing about the classical world and solves the apparent incompatibility between the ‘linear evolution’ and ‘projection’ postulates.

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Item Type: Published Article or Volume
Di Biagio, Andreaandrea.dibiagio@uniroma1.it0000-0001-9646-8457
Rovelli, Carlorovelli@cpt.univ-mrs.fr0000-0003-1724-9737
Additional Information: Published version, slightly revised from original preprint.
Keywords: quantum physics, relationalism, measurement problem, quantum-to-classical transition, decoherence, interpretation of quantum mechanics, relational interpretation of quantum mechanics
Subjects: Specific Sciences > Physics > Quantum Mechanics
Depositing User: Andrea Di Biagio
Date Deposited: 01 Mar 2021 03:57
Last Modified: 11 Jul 2024 13:09
Item ID: 18763
Journal or Publication Title: Foundations of Physics
Publisher: Springer
Official URL:
DOI or Unique Handle: 10.1007/s10701-021-00429-w
Subjects: Specific Sciences > Physics > Quantum Mechanics
Date: 27 February 2021
Volume: 51
Number: 30
ISSN: 1572-9516

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