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UID:1-80@lptms.universite-paris-saclay.fr
DTSTART:20121127T110000Z
DTEND:20121127T120000Z
DTSTAMP:20121113T112632Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-ezequiel-ferrero/
SUMMARY:Séminaire du LPTMS: Ezequiel Ferrero - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 27 Nov 12 11:00
DESCRIPTION:Non-steady relaxation and critical exponents at the depinning t
 ransition via large scale GPU simulations\nEzequiel Ferrero\, Centro Atóm
 ico Bariloche - CONICET\nWe study the non-steady relaxation of a driven on
 e-dimensional elastic interface at the depinning transition by extensive n
 umerical simulations concurrently implemented on graphics processing units
  (GPUs). We compute the time-dependent velocity and roughness as the inter
 face relaxes from a given initial configuration at the thermodynamic criti
 cal force. We extract critical exponents from the Short Time Dynamics beha
 vior of the system. Above the first\, non-universal  microscopic time-regi
 me\, we find a non-trivial long crossover towards the non-steady macroscop
 ic critical regime\, where it is accurate to fit. Our study may explain nu
 merical discrepancies (as large as 30% for the velocity exponent $\\beta$)
  found in the literature.\nIn addition\, if time permits\, I would like to
  briefly mention other implementations we have been developing for simulat
 ions in GPUs\, including Monte Carlo dynamics of classical spin systems an
 d Langevin dynamics for a $\\Phi^4$ model.\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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