Statut | Confirmé |
Série | TRI-SEMINAIRE |
Domaines | cond-mat |
Date | Lundi 6 Octobre 2014 |
Heure | 14:30 |
Institut | IPHT |
Salle | Salle Claude Itzykson, Bât. 774, Orme des Merisiers |
Nom de l'orateur | Francesco Zamponi |
Prenom de l'orateur | |
Addresse email de l'orateur | |
Institution de l'orateur | Laboratoire de Physique Théorique, École Normale Supérieure Paris |
Titre | Exact computation of the critical exponents of the jamming transition |
Résumé | The jamming transition marks the emergence of rigidity in a system of amorphous and athermal grains. It is characterized by a divergent correlation length of the force-force correlation and non-trivial critical exponents that are independent of spatial dimension, suggesting that a mean field theory can correctly predict their values. 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 analogy with the Sherrington-Kirkpatrick spin glass model emerges in the solution: as in the SK model, the glassy states turn out to be marginally stable, and are described by a Parisi equation. Marginal stability has a deep impact on the critical properties of the jamming transition and allows one to obtain analytic predictions for the critical exponents. The predictions are consistent with a recently developed scaling theory of the jamming transition, and with numerical simulations. Finally, I will briefly discuss some possible extensions of this approach to other open issues in the theory of glasses. |
Numéro de preprint arXiv | |
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