Berlin 2015 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 56: Aging in Physical and Biological Systems (focus session, joint DY/BP)

BP 56.4: Hauptvortrag

Freitag, 20. März 2015, 11:00–11:30, BH-N 334

Aging in coarsening systems with non-algebraic growth laws — •Michel Pleimling — Virginia Tech, Blacksburg, VA, USA

Physical aging is generically encountered in systems far from equilibrium that evolve with slow dynamics. Well known examples can be found in structural glasses, spin glasses, magnetic systems, and colloids. Recent years have seen major breakthroughs in our understanding of aging processes in non-disordered systems characterized by an algebraic growth of the domains. Progress in understanding aging in systems with more complicated growth laws has been much slower though. After a brief introduction into the phenomenology of aging in simple coarsening systems, I discuss in this talk non-equilibrium relaxation and aging processes in systems characterized by a non-algebraic growth of the ordered domains. Disordered ferromagnets provide interesting examples where the relaxation process is dominated by a slow crossover from an algebraic-like regime at early times to the slower asymptotic growth that prevails for large times. In order to study aging processes deep inside an anomalously slow growth regime we turn to different versions of the ABC model where the biased exchanges of particles of different types yield domains that only grow logarithmically with time.

This work is supported by the US Department of Energy through grant DE-FG02-09ER46613.