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SUMMARY:Large Deviation Functions in the Dynamics of Glasses - Prof. Juan 
 P. Garrahan\, University of Nottingam
DTSTART:20090122T141500Z
DTEND:20090122T154500Z
UID:TALK15434@talks.cam.ac.uk
CONTACT:Joe Bhaseen
DESCRIPTION:A natural statistical mechanics formalism to study systems wit
 h complex dynamics is the large deviation function formalism\, as devised 
 by Ruelle\, Derrida\, Lebowitz and others.  Large deviation functions are 
 to dynamics what free energies are to thermodynamics.  In this talk I will
  describe how to apply this formalism to the glass transition problem. I w
 ill show using large\ndeviation function methods that simple models of gla
 sses\, the so-called kinetically constrained models\, display a first-orde
 r phase transition in the space of trajectories.  A manifestation is the p
 henomenon of\ndynamic heterogeneity.  I will also describe how to calculat
 e large deviation functions in atomistic models\, via numerical techniques
  such as transition path sampling\, and discuss the implications of this s
 pace-time transition scenario to the glass transition problem in general.\
 n
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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