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<p>In a recent 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 <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10701_2025_836_Article_IEq3.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\psi \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>ψ</mi> </math></EquationSource> </InlineEquation>-ontic models must be orthogonal. In this note, we identify some crucial assumptions that lack physical motivation in their argument to the extent that the main claim is incorrect.</p>

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Comment on a No-Go Theorem for \(\psi \)-Ontic Models

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Laurens Walleghem,
  • Shashaank Khanna,
  • Rutvij Bhavsar

摘要

In a recent 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 \(\psi \) ψ -ontic models must be orthogonal. In this note, we identify some crucial assumptions that lack physical motivation in their argument to the extent that the main claim is incorrect.