Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série SEM-LPTMC
Domaines cond-mat.mes-hall
Date Jeudi 17 Octobre 2019
Heure 14:00
Institut LPTMC
Salle campus Jussieu, tower 13-12, 5th floor, room 523
Nom de l'orateur Ros
Prenom de l'orateur Valentina
Addresse email de l'orateur
Institution de l'orateur IPhT CEA Saclay
Titre Statistical properties of energy barriers and activated dynamics in mean-field models of glasses
Résumé Understanding the geometrical properties of high-dimensional, random energy landscapes is an important problem in the physics of glassy systems, with plenty of interdisciplinary applications. Among these properties, an important role is played by the statistics of stationary points, which is relevant in determining the evolution of local dynamics within the landscape. In this talk I will focus on the energy landscape of a simple model for glasses (the so-called spherical *p*-spin model) and I will present a framework to compute the statistical properties of the saddle points surrounding local minima of the landscape. I will discuss how this computation allows to extract information on the distribution of energy barriers surrounding the minimum, as well as on its connectivity in configuration space. I will comment on the dynamical implications on these results, especially for the activated regime of the dynamics, relevant when the dimension of configuration space is large but finite.
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