|How to calculate and measure the effective action and the avalanche size distribution for disordered systems|
|Laboratoire de Physique Théorique, ENS, Paris|
|giovedì 22 maggio 2008 , 16h40|
|Conferenze presentate ai workshop del Laboratorio (2008)|
Using methods of functional renormalization, we show how to measure the effective action or disorder correlator of elastic systems in a random environment. The disorder correlator, predicted to be cuspy due to shocks, is the central ingredient of functional renormalization, which is confirmed by numerical and experimental results. Building on these achievements, we compute the avalanche size distribution.