SUPERDYN - Extreme nonlinear dynamics of driven superconductors (DFM.AD002.110)

Thematic area

Physical sciences and technologies of matter

Project area

Structure responsible for the research project

Institutes for complex systems (ISC)

Project manager

JOSEGUILLERMO GARCIALORENZANA
Phone number: +3494381843
Email: jose.lorenzana@cnr.it

Abstract

Due to very long energy relaxation times and strong non-linearities superconductors are the workhorse of many solid state quantum technologies. Previous studies have shown that a periodically excited superconductor can be taken to a new highly-nonlinear regime where quasiparticles perform synchronous collective Rabi oscillations. SUPERDYN will address all the challenges to observe these and similar highly nonlinear states in experiments. In particular, we will analyse the thermalization process beyond a mean-field dynamics i.e. taking into account the effect of the environment, residual interactions and disorder. Results obtained with non-equilibrium diagrammatic techniques (Keldysh) will be validated compared with computations within non-equilibrium dynamical mean-field theory (DMFT). Both the transient nonlinearities and the steady-state nonlinearities will be studied. In the latter case we expect typical effects of nonlinear quantum optics as induced transparency.

Goals

A primary goal of this proposal is to understand how thermalization occurs when one goes beyond a pure BCS dynamics. A second goal of our proposal is to design a platform based on microwave superconducting devices to observe
nonlinear out-of-equilibrium states.

Start date of activity

15/12/2020

Keywords

Quantum technology, Nonlinear Optics, Superconductivity

Last update: 20/06/2025