Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series FORUM-ENS
Subjects cond-mat.stat-mech
Date Wednesday 16 October 2019
Time 12:00
Institute LPENS
Seminar Room Conf IV
Speaker's Last Name Ros
Speaker's First Name Valentina
Speaker's Email Address
Speaker's Institution ENS
Title Statistical properties of energy barriers and activated dynamics in mean-field models of glasses
Abstract 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.
arXiv Preprint Number

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