4.6 Article

Contextual Inferences, Nonlocality, and the Incompleteness of Quantum Mechanics

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ENTROPY
卷 23, 期 12, 页码 -

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MDPI
DOI: 10.3390/e23121660

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quantum mechanics; contextuality; inferences; nonlocality

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The violation of Bell's inequality and classical local realism is attributed to quantum mechanics violating predictive completeness, allowing contextual inferences to be made. Completing the usual quantum state requires specifying the measurement context rather than searching for hidden variables.
It is known that quantum non locality , leading to the violation of Bell's inequality and more generally of classical local realism, can be attributed to the conjunction of two properties, which we call here elementary locality and predictive completeness. Taking this point of view, we show again that quantum mechanics violates predictive completeness, allowing the making of contextual inferences, which can, in turn, explain why quantum non locality does not contradict relativistic causality. An important question remains: if the usual quantum state psi is predictively incomplete, how do we complete it? We give here a set of new arguments to show that psi should be completed indeed, not by looking for any hidden variables , but rather by specifying the measurement context, which is required to define actual probabilities over a set of mutually exclusive physical events.

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