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Paper detail

A contextually objective approach to the extended Wigner's friend thought experiment

We present a discussion of the extended Wigner's friend thought experiment proposed by Frauchiger and Renner in [1]. We show by using various arguments, including textbook quantum mechanics and the ontological approach of Contexts, Systems, Modalities (CSM), that no contradiction arises if one admits that agents must agree on what is considered as a system and what is not. In such a contextually objective approach of quantum mechanics, the apparent contradiction is automatically removed. We also discuss why this mutual agreement between agents is already implicit in the standard formulations of quantum mechanics, and why removing it leads to inconsistencies.

preprint2023arXivOpen access
Maxime FedericoPhilippe Grangier
physics.hist-phquant-ph
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Maxime FedericoPhilippe Grangier

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