Tomorrow seminar

[Cond.Matt. & Stat.Mech.Section]

INFORMAL SEMINAR on    Statistical Physics
 



Thursday, 22 March    -    2:30 p.m.

 

 

Euler Lecture Hall, ICTP Leonardo Building - terrace level

 

 

Alexander DOBRINEVSKI       ( Ecole Normale Superieure, Paris )

 

"Avalanches in disordered elastic systems"

 

Abstract

 

Disordered systems typically respond non-smoothly to external driving.  This manifests itself in Barkhausen noise, earthquakes and avalanches in granular media.  A simple classical model which describes such phenomena quite accurately is a particle driven by a spring on a Brownian random-force landscape (also known as the ABBM model).  I will present some analytical results on statistics of avalanches in this model.  I will then show how the ABBM model arises as the mean-field limit of a spatially extended elastic interface in a disordered environment. In the end I will discuss the behavior below the upper critical dimension using renormalization-group methods.