The authors derive a GHZ-FR paradox from strong contextuality that avoids post-selection and quantum reasoning by modeled observers, unlike the original FR paradox.
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Observers in distinct Everettian multiverse branches can communicate via a Wigner's friend scenario without violating quantum linearity, provided they forget the message sent.
citing papers explorer
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A refined Frauchiger--Renner paradox based on strong contextuality
The authors derive a GHZ-FR paradox from strong contextuality that avoids post-selection and quantum reasoning by modeled observers, unlike the original FR paradox.
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Quantum observers can communicate across multiverse branches
Observers in distinct Everettian multiverse branches can communicate via a Wigner's friend scenario without violating quantum linearity, provided they forget the message sent.