QLunch: Owen Ekblad

Speaker: Owen Ekblad, Michigan State University

Title: A framework for studying randomized open quantum dynamics

Abstract: The interaction between an open quantum system and its environment may be modelled by a sequence of open quantum operations; this is the repeated interactions (or, quantum collision models) approach to understanding open quantum dynamics. In the literature, various randomizations of this model have been considered, including the cases where the sequence of quantum operations modelling the dynamics form either i.i.d. or Markovian stochastic processes.

These randomizations account for various sources of disorder that may arise in experimentation, including uneven system-environment interaction times and dynamics within the environment itself. Notably, the disorder may not, in general, be i.i.d.: correlations between time steps may exist. In this talk, I will present a framework in which one can study such randomized open quantum dynamics, unifying both the i.i.d. and Markovian models into a single theory. As an example application, I will present ongoing work with Moreno Nadales, Pathirana, and Schenker on quantum trajectories.