Bosonization of noise effects in nonlocal quantum dynamics

We consider a class of open quantum systems where a system is non-locally coupled to an environment, with coupling strength scaling as the inverse square root of the environment size. These models describe long-range interactions beyond mean-field approximations, in which the system of interest interacts centrally with a large reservoir. We demonstrate that these models exhibit universal bosonic behavior as a consequence of the quantum central limit theorem: in the thermodynamic limit of the reservoir, the reduced dynamics of the system becomes equivalent to that of the system linearly coupled to an environment of bosonic modes.

This initiative is part of the "PhD Lectures" activity of the project "Departments of Excellence 2023-2027" of the Department of Mathematics of Politecnico di Milano. This activity consists of seminars open to PhD students, followed by meetings with the speaker to discuss and go into detail on the topics presented at the talk.