JCMS: Multi-time memory in open quantum systems

by Fabio Costa (Nordita)

Monday 23 Feb 2026, 10:30 → 11:30 Europe/Stockholm

Memory effects in open quantum systems, resulting from the interaction with an environment, lead to multi-time correlations that cannot be capture by standard dynamical maps or master equations. I will present a framework that enables a complete and faithful characterisation of an arbitrary quantum process, providing tools for qualitative and quantitative characterisation of memory effects. In this framework, a quantum process is modelled through a process matrix, which can be seen as a temporal analogue of a many-body quantum state. This opens the possibility of transferring concepts and techniques from many-body quantum systems to multi-time correlations.