Seminar: "Fuzzy Measurements and Coarse Graining in Many-Body Quantum Systems" by C. Pineda UNAM (Mesico)

 ABSTRACT: We investigate fuzzy measurements and coarse graining in many-body systems from a quantum perspective, utilizing the concept of imperfect detectors. In order to address these issues, we employ the language of quantum channels, whose foundations will be reviewed during the presentation. We demonstrate how to consider various geometries adaptable to a wide range of experimental situations. Furthermore, we characterize these channels and find that the observable state space contracts dramatically with the number of particles. We will discuss relevant advancements pertaining to the observed effective dynamicsand the entropy associated with observable states.