Simulating systems with absorbing state transitions
- Event time: 2:00pm
- Event date: 13th November 2009
- Speaker: Conrad Barrett-Freeman (Formerly School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Absorbing state phase transitions are of particular interest in non-equilbrium statistical physics due to their strong violation of detailed balance. Unfortunately, a simple Euler approach to discretizing the Langevin equation runs into difficulties as the order parameter often becomes negative, which would be unphysical in most physical situations where it models a density. I will present an elegant operator splitting method proposed by Dornic et al and use Directed Percolation as a worked example of its usage. Directed Percolation is perhaps the most ubiquitous of absorbing phase transitions and represents arguably the only robust non-equilibrium universality class to date.
This is a roughly weekly series of didactical blackboard talks focussing on some theoretical aspect of Condensed Matter, Biological, and Statistical Physics..