Quantum mechanics violates a causal inequality derived from absoluteness of observed events plus axiological time symmetry and no retrocausality in timelike scenarios, even under a weakened operational version of absoluteness.
Nature Physics16(12), 1199–1205 (2020) https://doi
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Black hole paradoxes favor Wigner's Friend responses that posit intrinsic relationality and retrocausality.
Subjective collapse views fail in the extended Wigner's friend scenario, but single-world interpretations remain possible if observations are protected from quantum erasure.
citing papers explorer
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Limits of Absoluteness of Observed Events in Timelike Scenarios: A No-Go Theorem
Quantum mechanics violates a causal inequality derived from absoluteness of observed events plus axiological time symmetry and no retrocausality in timelike scenarios, even under a weakened operational version of absoluteness.
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What Do Black Holes Teach Us About Wigner's Friend?
Black hole paradoxes favor Wigner's Friend responses that posit intrinsic relationality and retrocausality.
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The extended Wigner's friend, many- and single-worlds and reasoning from observation
Subjective collapse views fail in the extended Wigner's friend scenario, but single-world interpretations remain possible if observations are protected from quantum erasure.