Speaker: José Polo-Gómez
Affiliation: Max-Planck-Institut für Quantenoptik
Date: Wednesday, 10 December 2025 at 12:00
Location: Seminar Room, Serrano 113b
In this talk, we will define and characterize localized causal operations in a real scalar quantum field theory, and we will show that these operations exactly correspond to those satisfying various equivalent no-signalling conditions. We will show that there is a straightforward correspondence between this characterization and previous results for discrete quantum mechanical systems. Finally, we will define a faithful quantifier of how much a map enables faster-than-light signalling in a given field state, and we will apply our results to revisit relevant examples, providing straightforward proofs of their causal (or acausal) behaviour.