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On the reality of the quantum state once again: A no-go theorem for ψ-ontic models

Carcassi, Gabriele and Aidala, Christine A and Oldofredi, Andrea (2022) On the reality of the quantum state once again: A no-go theorem for ψ-ontic models. [Preprint]

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Abstract

In this paper we show that ψ-ontic models, as defined by Harrigan and Spekkens (HS), cannot reproduce quantum theory. Instead of focusing on probability, we use information theoretic considerations to show that all pure states of ψ-ontic models must be orthogonal to each other, in
clear violation of quantum mechanics. Given that (i) Pusey, Barrett and Rudolph (PBR) previously showed that ψ-epistemic models, as defined by HS, also contradict quantum mechanics, and (ii) the HS categorization is exhausted by these two types of models, we conclude that the HS categorization
itself is problematic as it leaves no space for models that can reproduce quantum theory.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Carcassi, Gabrielecarcassi@umich.edu0000-0002-1071-6251
Aidala, Christine Acaidala@umich.edu0000-0001-9540-4988
Oldofredi, AndreaAndrea.Oldofredi@unil.ch
Additional Information: Accepted for publication in Foundations of Physics
Keywords: PBR theorem; quantum state; entropy; epistemic; ontic
Subjects: Specific Sciences > Physics > Quantum Mechanics
Depositing User: Dr. Andrea Oldofredi
Date Deposited: 14 Dec 2023 00:35
Last Modified: 14 Dec 2023 00:35
Item ID: 22839
Subjects: Specific Sciences > Physics > Quantum Mechanics
Date: 2022
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/22839

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