Fisica statistica

Static avalanches in systems of spheres

by Stefano Spigler (LPTMS, Paris Sud)

Europe/Rome
Aula 2 (Dipartimento di Fisica - Ed. E. Fermi)

Aula 2

Dipartimento di Fisica - Ed. E. Fermi

Description
Disordered systems respond to external perturbations via a random, discontinuous response. We present a way to derive the distribution of such discontinuous jumps in mean-field systems with replica symmetry breaking, and compare the results with quasi-static simulations of soft spheres in 3D, either at jamming or in the denser (UNSAT) phase. In both cases a power law behavior is found when the perturbation is sufficiently small, and the predicted exponent, related to other critical exponents of soft spheres at jamming, is shown to be in agreement with the one extracted from the simulations.