Epistemic Boundaries and Quantum Indeterminacy: What Local Observers Can
(Not) Predict
- URL: http://arxiv.org/abs/2310.09121v1
- Date: Fri, 13 Oct 2023 14:09:18 GMT
- Title: Epistemic Boundaries and Quantum Indeterminacy: What Local Observers Can
(Not) Predict
- Authors: Johannes Fankhauser
- Abstract summary: We argue that post-quantum theories can offer predictive advantage whilst conforming to the Born rule on average.
We uncover a fascinating possibility: when the assumption of'reliable intersubjectivity' between different observers is violated, subjective predictive advantage can, in principle, exist.
The findings reconcile us to quantum uncertainty as an aspect of limits on Nature's predictability.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: One of quantum theory's salient lessons is its inherent indeterminacy. That
is, generic physical states imply uncertainty for the outcomes of measurements.
We formally define and address whether quantum uncertainty could be fundamental
or whether post-quantum theories can offer predictive advantage whilst
conforming to the Born rule on average. We present a no-go claim combining
three aspects: predictive advantage, signal-locality, and the epistemic
relationship between quantum observers. The results of the analysis lead to the
conclusion that there exists a fundamental limitation on genuine predictive
advantage over standard quantum probabilities. However, we uncover a
fascinating possibility: when the assumption of 'reliable intersubjectivity'
between different observers is violated, subjective predictive advantage can,
in principle, exist. This, in turn, entails an epistemic boundary between
different observers of the same theory. The findings reconcile us to quantum
uncertainty as an aspect of limits on Nature's predictability.
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