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UID:69dafbc6129ea
DTSTAMP:20260411T215622
DTSTART:20171220T143000
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URL:https://murmitoyen.com/events/vanille/udem/detail/798933-jean-sebastien
 -bernier-uni-bonn-n-propagation-of-correlations-in-dissipative-systems-bal
 listic-diffusive-and-aging-dynamics
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Jean-Sébastien Bernier\, Uni Bonn – Propagation of correlations 
 in dissipative systems: ballistic\, diffusive and aging dynamics
DESCRIPTION:Dr. Jean-Sébastien Bernier\, HISKP\, Universität Bonn\, Nussa
 llee 14-16\, D-53115 Bonn\, Germany
\n 
\nIn recent years\, considerable 
 experimental efforts have been devoted to dynamically generate complex sta
 tes and monitor their evolution. Despite remarkable advances\, the theoret
 ical principles behind the non-equilibrium dynamics of strongly correlated
  quantum matter are still far from being understood. In particular\, very 
 few studies have sought to clarify the influence of environmental coupling
 s on the propagation of correlations. We attempt here to fill this gap. Co
 nsidering first an interaction quench in the Bose-Hubbard model under the 
 effect of dephasing\, we observe that dissipation effectively speeds up th
 e propagation of single-particle correlations while reducing their coheren
 ce. In contrast\, for two-point density correlations\, the initial ballist
 ic propagation regime gives way to diffusion at intermediate times. In a s
 econd time\, considering the Heisenberg model in contact with a similar en
 vironment\, we find this system to display aging. A dynamical phenomenon c
 haracterized by a breakdown of time-translation invariance\, a slow non-ex
 ponential relaxation of two-time correlations and the presence of dynamica
 l scaling.
\n 
\nSite web du groupe du Dr Bernier
\n 
\nCette conféren
 ce est présentée par le RQMP Versant Nord du Département de physique
  de l'Université de Montréal et le Département de génie physique de
  Polytechnique Montréal.
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