Conventional Quantum Theory Does Not Support A Coherent Relational Account

• URL: http://arxiv.org/abs/2406.17290v2
• Date: Thu, 03 Oct 2024 05:13:04 GMT
• Title: Conventional Quantum Theory Does Not Support A Coherent Relational Account
• Authors: R. E. Kastner,
• Abstract summary: Quantum theory in conventional formulation is notoriously subject to various measurement-related paradoxes. Inconsistencies concerning the outcomes of measurements can be revealed among observers. implications for the debate concerning the viability of quantum theory in its various formulations are discussed.
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• Abstract: Quantum theory in its conventional formulation is notoriously subject to various measurement-related paradoxes, as exemplified by the "Schrodinger's Cat" and "Wigner's Friend" thought experiments. It has been shown, for example by Frauchiger and Renner, that nested measurements such as those occurring in the Wigner's Friend experiment can lead to inconsistencies concerning the putative outcomes of measurements. Such inconsistencies are commonly presumed to remain private and incommensurable, but this is not the case. A counterexample, in which the inconsistencies can be revealed among the observers, is reviewed. The implications for a recent attempt to shield Relational Quantum Mechanics from such inconsistencies are considered, and it is concluded that the attempt is not successful. Further implications for the state of the debate concerning the viability of quantum theory in its various formulations are discussed.

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