A single space-time is too small for all of Wigner's friends

Jacques L. Pienaar

A single space-time is too small for all of Wigner's friends

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arxiv 2312.11759 v2 pith:XQJX2WCW submitted 2023-12-19 quant-ph gr-qc

Jacques L. Pienaar This is my paper · ORCID

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keywords space-timeeventsinterpretationsobservedrejectsingleabsolutenessappear

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Recent no-go theorems on interpretations of quantum theory featuring an assumption of `Absoluteness of Observed Events' (AOE) are shown to have an unexpectedly strong corollary: one cannot reject AOE and at the same time assume that the `observed events' in question can all be embedded within a single background space-time common to all observers. Consequently, interpretations that reject AOE appear incompatible with a `block universe' view of space-time.

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Events and their Localisation are Relative to a Lab
quant-ph 2025-05 conditional novelty 6.0 of 10

Events, their localisation, and even conclusions about indefinite causal order in the quantum switch are shown to depend on the choice of a Lab and its reference degrees of freedom.

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