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SUMMARY:Sampling rare events in non-stationary dynamics - Dr Josh Berryman
  (University of Luxembourg)
DTSTART:20120120T120000Z
DTEND:20120120T130000Z
UID:TALK33481@talks.cam.ac.uk
CONTACT:Dr Mark Miller
DESCRIPTION:Study of rare events such as nucleation or arrest in non-equil
 ibrium physics is ever more fashionable\, but\nexisting rare event methods
  intended to enhance sampling (such as umbrella sampling and FFS) are not 
 usually\npractical for general nonequilibrium conditions (away from both s
 tationary and metastable states).  A novel\nmethod for calculating the tim
 e-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 Glaube
 r-Ising model under time-varying shear flow\, the Kawasaki-Ising model aft
 er a quench into the region between nucleation dominated and spinodal deco
 mposition dominated phase change dynamics\, and also for the parallel-open
  asymmetric exclusion process. The method requires a subdivision of the ph
 ase space of the system: it is benchmarked and found to scale well for inc
 reasingly fine subdivisions\, meaning that it can be applied without detai
 led foreknowledge of the physically important reaction\npathways.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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