Seminar über Theorie der kondensierten Materie / TRR146 Seminar

Oct. 18, 2011 at 1:15 p.m. in Newton-Raum (01-122, Bau 2.413)

F. Schmid
friederike.schmid@uni-mainz.de

P. Virnau
virnau@uni-mainz.de

L. Stelzl
lstelzl@uni-mainz.de

Sampling Rare Events in Non-Stationary Dynamics
Dr. Josh Berryman (University of Luxembourg)


Study of rare events such as nucleation or arrest in non-equilibrium physics is ever more fashionable, but existing rare event methods (TPS, TIS, FFS) are not usually practical for general nonequilibrium conditions, away from both stationary and metastable states. A novel method for calculating the time-series of the probability of a rare event is presented which is designed for these conditions. The method is validated for the cases of the Glauber-Ising model under time-varying shear flow, the Kawasaki-Ising model after a quench into the region between nucleation dominated and spinodal decomposition dominated phase change dynamics, and also for the parallel-open asymmetric exclusion process. The method requires a subdivision of the phase space of the system: it is benchmarked and found to scale well for increasingly fine subdivisions, meaning that it can be applied without detailed foreknowledge of the physically important reaction pathways.