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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-292@lptms.universite-paris-saclay.fr
DTSTART:20141006T143000Z
DTEND:20141006T153000Z
DTSTAMP:20140922T101912Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/tri-semianire-de-
 physique-statistique-francesco-zamponi/
SUMMARY:Tri-séminaire de Physique Statistique : Francesco Zamponi - IPhT\,
  CEA-Saclay\, salle Itzykson - 6 Oct 14 14:30
DESCRIPTION:Exact computation of the critical exponents of the jamming tran
 sition\nFrancesco Zamponi\, LPTENS\nThe jamming transition marks the emerg
 ence of rigidity in a system of amorphous and athermal grains. It is chara
 cterized by a divergent correlation length of the force-force correlation 
 and non-trivial critical exponents that are independent of spatial dimensi
 on\, suggesting that a mean field theory can correctly predict their value
 s. I will discuss a mean field approach to the problem based on the exact 
 solution of the hard sphere model in infinite dimension. An unexpected ana
 logy with the Sherrington-Kirkpatrick spin glass model emerges in the solu
 tion: as in the SK model\, the glassy states turn out to be marginally sta
 ble\, and are described by a Parisi equation. Marginal stability has a dee
 p impact on the critical properties of the jamming transition and allows o
 ne to obtain analytic predictions for the critical exponents. The predicti
 ons are consistent with a recently developed scaling theory of the jamming
  transition\, and with numerical simulations. Finally\, I will briefly dis
 cuss some possible extensions of this approach to other open issues in the
  theory of glasses.
LOCATION:IPhT\, CEA-Saclay\, salle Itzykson\, CEA - Saclay\, Saclay\, Franc
 e
GEO:48.73668;2.180033999999978
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 nce;X-APPLE-RADIUS=100;X-TITLE=IPhT\, CEA-Saclay\, salle Itzykson:geo:48.7
 3668,2.180033999999978
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