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

Area tematica

Scienze fisiche e tecnologie della materia

Area progettuale

Struttura responsabile del progetto di ricerca

Istituto dei sistemi complessi (ISC)

Responsabile di progetto

JOSEGUILLERMO GARCIALORENZANA
Telefono: +3494381843
E-mail: 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.

Obiettivi

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.

Data inizio attività

15/12/2020

Parole chiave

Quantum technology, Nonlinear Optics, Superconductivity

Ultimo aggiornamento: 03/08/2025