Adamantia Zampeli

Jeudi 03 Avril 2025, 14h00, salle E4.13b

Adamantia Zampeli

International Centre for Theory of Quantum Technologies, University of Gdansk

Composition of local observables in quantum field theory: Towards a consistent measurement theory

Relativistic quantum information is the attempt to formulate quantum information protocols for quantum field theory. An important prerequisite to achieve this is a consistent theory of measurements in quantum field theory which we still lack. The standard treatment is based on the S-matrix paradigm which is restrictive in many ways as for instance that it can describe consistently only single time measurements. However, to formulate a complete theory of measurements we need to be able to describe sequential in time measurements or moregenerally the composition of local spacetime measurements. This can be achieved in a local and covariant framework of quantum field theory inspired by histories-based frameworks. In this talk, I describe some steps towards a local and compositional theory of measurements and I shortly discuss how this formalism can generalise the S-matrix paradigm.
 

Lien teams: https://teams.microsoft.com/l/meetup-join/19%3aac3d3339d1c740e0a3b81b94e49808c1%40thread.tacv2/1698658652943?context=%7b%22Tid%22%3a%22b8c19512-2aed-471d-a8d1-9b06e7da786a%22%2c%22Oid%22%3a%222ea0eb78-4abd-439c-8240-cc89774321a2%22%7d