PIRSA:19090063 Scientific Series Quantum Foundations

DOI10.48660/19090063

Series: Quantum Foundations

Eckstein, M. (2019). Operational Causality in Spacetime. Perimeter Institute. https://pirsa.org/19090063

Eckstein, Michal. Operational Causality in Spacetime. Perimeter Institute, Sep. 03, 2019, https://pirsa.org/19090063 

@misc{ pirsa_PIRSA:19090063,
  doi = {10.48660/19090063},
  url = {https://pirsa.org/19090063},
  author = {Eckstein, Michal},
  keywords = {Quantum Foundations},
  language = {en},
  title = {Operational Causality in Spacetime},
  publisher = {Perimeter Institute},
  year = {2019},
  month = {sep},
  note = {PIRSA:19090063 see, \url{https://pirsa.org}}
}

Abstract

The no-signalling principle, preventing superluminal communication and the consequent logical paradoxes, is typically formulated within the information-theoretic framework in terms of admissible correlations in composite systems. In my talk, I will present its complementary incarnation associated with dynamics of single systems subject to invasive measurements. The `dynamical no-signalling principle' applies to any theory with well defined rules of calculating detection statistics in spacetime. It thus offers a new framework, based on measure theory, for studying ``post-quantum'' theories in spacetime. I will show that, strikingly, the `dynamical no-signalling' principle rules out some of the well know models of quantum wave dynamics.

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