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Comment on a no-go theorem for $ψ$-ontic models
Published 20 Feb 2024 in quant-ph | (2402.13140v1)
Abstract: In a paper [Carcassi, Oldofredi and Aidala, Found Phys 54, 14 (2024)] it is claimed that the whole Harrigan--Spekkens framework of ontological models is inconsistent with quantum theory. They show this by showing that all pure quantum states in $\psi$-ontic models must be orthogonal. In this note, we identify some crucial mistakes in their argument to the extent that the main claim is incorrect.
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