Renormalization and disorder : a simple toy model

by Giovanni Felder (ETH-Zurigo)

Wednesday 17 Mar 2021, 14:30 → 16:00 Europe/Rome

The problem of the depinning transition of a line from a random
substrate is one of the simplest problems in the the theory of
disordered systems. It has a long history among physicists and
mathematicians. Still there are some open questions about the
nature of this transition.
I will discuss a simple tree-like toy model which indicates that,
when disorder is relevant, the depinning transition becomes an
infinite order transition of the Berezinski-Kosterlitz-Thouless
type.  I will also try to present some recent developments
allowing to understand how the precise nature of the singularity
at the transition depends on the distribution of disorder.

Link per il collegamento: https://meet.google.com/pip-kvzt-fkz