Volume 144, Number 6, December 2023
|Number of page(s)
|10 January 2024
Extracting Bayesian networks from multiple copies of a quantum system
1 Institute for Theoretical Physics I, University of Stuttgart - D-70550 Stuttgart, Germany
2 Instituto de Física da Universidade de São Paulo - 05314-970 São Paulo, Brazil
3 Department of Physics and Astronomy, University of Rochester - Rochester, NY 14627, USA
Received: 10 October 2023
Accepted: 20 December 2023
Despite their theoretical importance, dynamic Bayesian networks associated with quantum processes are currently not accessible experimentally. We here describe a general scheme to determine the multi-time path probability of a Bayesian network based on local measurements on independent copies of a composite quantum system combined with postselection. We further show that this protocol corresponds to a nonprojective measurement. It thus allows the investigation of the multi-time properties of a given local observable while fully preserving all its quantum features.
© 2024 The author(s)
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