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TZID:Europe/Paris
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UID:0-582@lptms.universite-paris-saclay.fr
DTSTART:20180220T113000Z
DTEND:20180220T120000Z
DTSTAMP:20180215T095552Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
s-alexandre-lazarescu-2/
SUMMARY:Séminaire du LPTMS: Alexandre Lazarescu - LPTMS\, salle 201\, 2èm
e étage\, Bât 100\, Campus d'Orsay - 20 Fév 18 11:30
DESCRIPTION:On the hydrodynamic behaviour of interacting lattice gases far
from equilibrium\nAlexandre Lazarescu (Centre de Physique Théorique\, Éc
ole Polytechnique)\nLattice gases are a particularly rich playground to st
udy the large scale emergent behaviour of microscopic models. A few things
are known in general for models that are sufficiently close to equilibriu
m (i.e. with rates close to detailed balance\, and where the dynamics is t
ypically diffusive): in particular\, the local density of particles behave
s autonomously in the macroscopic limit\, even at the level of large devia
tions\, and the system can be described through a Langevin equation involv
ing only a few quantities called transport coefficients. As demonstrated i
n the previous talk\, obtaining those coefficients in practice can be quit
e challenging\, but we can usually be confident that they exist.\n\nI will
be talking about a situation that is quite different at first sight: syst
ems far from equilibrium\, where the dynamics is propagative\, and where v
ery little is known in general. The question is then whether one can hope
to be able to describe those models with a similar hydrodynamic structure\
, or if that description breaks down (if\, for instance\, long-range corre
lations become relevant). I will present recent results showing that\, for
a broad class of 1D models with hard-core repulsion but also interactions
and space-dependent rates\, the answer is yes and no: all those models ex
hibit a dynamical phase transition between a hydrodynamic regime and a hig
hly correlated one\, which can be related to the so-called "third order ph
ase transitions". The methods involved are quite general and likely to be
applicable to many more families of models.\n\n A. Lazarescu\, Generic Dyn
amical Phase Transition in One-Dimensional Bulk-Driven Lattice Gases with
Exclusion\, J. Phys. A: Math. Theor. 50\, 254004 (2017)\n
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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