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Relative Information, Relative Facts

Di Biagio, Andrea and Rovelli, Carlo (2025) Relative Information, Relative Facts. [Preprint]

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Abstract

We offer a fresh perspective on the relational interpretation of quantum mechanics as a way of thinking about the world described by quantum theory based on quantifiable notions of information. This allows us to provide a definition of a relative fact, with no addition to orthodox quantum theory and no fundamentally special role for observers. By associating perspectives with commutative observables rather than entire quantum systems, several previous problems with the interpretation are dissolved. As a side result, we show how a quantum measurement, properly described, is a continuous process.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Di Biagio, Andreaandrea.dibiagio@oeaw.ac.at0000-0001-9646-8457
Rovelli, Carlorovelli@cpt.univ-mrs.fr0000-0003-1724-9737
Keywords: relational quantum mechanics, RQM, relative facts, interpretation, QM, quantum foundations, Wigner's friend
Subjects: General Issues > Scientific Metaphysics
General Issues > Operationalism/Instrumentalism
General Issues > Philosophers of Science
Specific Sciences > Probability/Statistics
Specific Sciences > Physics > Quantum Mechanics
General Issues > Realism/Anti-realism
Depositing User: Andrea Di Biagio
Date Deposited: 13 Oct 2025 17:13
Last Modified: 13 Oct 2025 17:13
Item ID: 26911
Subjects: General Issues > Scientific Metaphysics
General Issues > Operationalism/Instrumentalism
General Issues > Philosophers of Science
Specific Sciences > Probability/Statistics
Specific Sciences > Physics > Quantum Mechanics
General Issues > Realism/Anti-realism
Date: 13 October 2025
URI: https://philsci-archive.pitt.edu/id/eprint/26911

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