PIRSA:24040099

Video URL

https://pirsa.org/24040099

Information dynamics or dynamics from information

Scandi, M. (2024). Information dynamics or dynamics from information. Perimeter Institute for Theoretical Physics. https://pirsa.org/24040099

Scandi, Matteo. Information dynamics or dynamics from information. Perimeter Institute for Theoretical Physics, Apr. 18, 2024, https://pirsa.org/24040099 

          @misc{ scivideos_PIRSA:24040099,
            doi = {10.48660/24040099},
            url = {https://pirsa.org/24040099},
            author = {Scandi, Matteo},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Information dynamics or dynamics from information},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2024},
            month = {apr},
            note = {PIRSA:24040099 see, \url{https://scivideos.org/pirsa/24040099}}
          }

Matteo Scandi Institute for Cross-Disciplinary Physics and Complex Systems (IFISC)

Talk numberPIRSA:24040099
DOI10.48660/24040099
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

In this talk the role of information theory in the description of physical evolutions will be discussed. After defining information quantifiers, their contractivity with respect to physical dynamics will be explained, a requirement which simply encodes the intuition that noisy transformations should lose information. The interplay between the two concepts will be exemplified for Markovian evolutions, showing how Markovianity can be defined in purely information theoretic terms. Extending on this result, we prove our main theorem: that all physical maps can be defined solely in terms of a particular metric on the space of density matrices, the Fisher information. This result should be understood in the context of reconstruction of quantum mechanics, proving once again the key role of information in shaping our description of the world.

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