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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-631@lptms.universite-paris-saclay.fr
DTSTART:20181030T110000Z
DTEND:20181030T120000Z
DTSTAMP:20181023T142302Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-alberto-biella/
SUMMARY:Séminaire du LPTMS: Alberto Biella - LPTMS\, salle 201\, 2ème ét
 age\, Bât 100\, Campus d'Orsay - 30 Oct 18 11:00
DESCRIPTION:Efficient stochastic unraveling of disordered open quantum syst
 ems\nAlberto Biella (Laboratoire Matériaux et Phénomènes Quantiques\, U
 niversité Paris Diderot)\nThe interplay of interaction\, dissipation and 
 driving in open quantum systems can trigger transitions between nonequilib
 rium phases. Such behaviour can emerge in extended lattices\, in more then
  one spatial dimension\, when homogenous systems are considered. However\,
  in any realistic experimental realization\, disorder cannot be neglected.
  In this work we develop a method to efficiently unravel the density matr
 ix of a generic disordered open quantum system exploiting stochastic traje
 ctories. We use it to study the effect of on-site disorder in the paradigm
 atic driven-dissipative Bose-Hubbard lattice in two dimensions. In particu
 lar\, we will focus on the role of the disorder when the system is driven 
 across a first-order transition from the low- to the high-density phase. W
 e found that the disorder induces the formation of density domains which p
 rogressively smears the sharp transition leading to a crossover behaviour 
 in the thermodynamic limit. We characterize this mechanism in terms of pho
 ton density and spatial correlation functions and we discuss how inhomogen
 eities affects the bistable dynamics of the system at the transition. Our 
 results are relevant for state-of-the-art experiments in extended photonic
  lattices based on semiconductor microcavities and superconducting circuit
 s.
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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