The arrow of time in operational formulations of quantum theory

  title={The arrow of time in operational formulations of quantum theory},
  author={Andrea Di Biagio and Pietro Don{\`a} and Carlo Rovelli},
The operational formulations of quantum theory are drastically time oriented. However, to the best of our knowledge, microscopic physics is time-symmetric. We address this tension by showing that the asymmetry of the operational formulations does not reflect a fundamental time-orientation of physics. Instead, it stems from built-in assumptions about the users of the theory. In particular, these formalisms are designed for predicting the future based on information about the past, and the main… Expand
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Is a time symmetric interpretation of quantum theory possible without retrocausality?
  • M. Leifer, Matthew F Pusey
  • Physics, Mathematics
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2017
It is shown that the assumption that a time symmetric ontology for quantum theory must necessarily be retrocausal can be replaced by a different assumption, called λ-mediation, that plausibly holds independently of the status of the quantum state, and that this assumption implies a timelike analogue of Bell's local causality criterion. Expand
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