FisMat2017 - Submission - View

Abstract's title: Strong correlations in the dynamics of quenched and driven lattice quantum systems
Submitting author: Francesco Peronaci
Affiliation: Institute de Physique Theorique - Universite Paris Saclay
Affiliation Address: Orme des Merisiers Gif-sur-Yvette
Country: France
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations:
Abstract

The field of nonequilibrium dynamics of strongly correlated systems has
experienced a fast growth in the last years, motivated by experimental ad-
vances in cold-atom manipulation and ultrafast spectroscopy of solids, as well
as by fundamental theoretical questions about the evolution of quantum sys-
tems.
Here we study the dynamics of an Hubbard model, a prototype example
of strong correlation physics, in presence of an interaction which is either sud-
denly changed or periodically modulated in time. In the first case we focus
on the attractive regime and study the dynamics of the superconducting order
parameter. We use dynamical mean-field theory (DMFT) with a weak cou-
pling solver (IPT) to study how the coherent solitonic oscillations predicted by
time-dependent mean-field theory are affected by quantum fluctuations. In the
second case we consider the repulsive and paramagnetic case of the Hubbard
model and solve DMFT using a strong coupling solver (NCA). We show that
the system under periodic driving eventually reaches the infinite temperature
limit, and discuss different heating regimes as well as the conditions under
which the system synchronizes or not with the drive.