Physikalisches Kolloquium

Fakultät für Physik
Physikalisches Kolloquium
Prof. Leticia Cugliandolo
Universite Pierre et Marie Curie - Paris 6
Phase ordering kinetics in two
dimensions
A system taken across a second order phase transition from its disordered into its symmetry-broken
phase undergoes a phase ordering process. It is commonly accepted that after the quench the system
enters a dynamic scaling regime.
The celebrated classical two-dimensional Ising model with non-conserved order parameter dynamics
(used to model magnetic systems) is a typical example in this class of systems.
We recently revisited this problem from a geometric perspective finding a number of surprising features
that were not appreciated before and that I will discuss in this talk.
In particular, we showed that the dynamics after an instantaneous quench actually proceeds in two
steps: in a first regime the dynamics approaches critical percolation, while in a subsequent regimes
the system phase orders in the expected way. This phenomenon also exists in other two dimensional
models with different microscopic dynamics. It opens the way to intriguing connections between
coarsening and percolation theory.
Montag, 09.05.2016, 16:15 Uhr
Ort: Hörsaal 6