Simple strong glass forming models: mean-field solution with activation

Details Simple strong glass forming models: mean-field solution with activation Simple strong glass forming models: mean-field solution with activation

2002-09-16

arxiv.org/abs/cond-mat/0209362v1

J. Phys. A 36, 307 (2003)

Physics

Condensed Matter

Statistical Mechanics

18 pages, 9 figures

Scientific paper

10.1088/0305-4470/36/2/302

We introduce simple models, inspired by previous models for froths and covalent glasses, with trivial equilibrium properties but dynamical behaviour characteristic of strong glass forming systems. These models are also a generalization of backgammon or urn models to a non--constant number of particles, where entropic barriers are replaced by energy barriers, allowing for the existence of activated processes. We formulate a mean--field version of the models, which keeps most of the features of the finite dimensional ones, and solve analytically the out--of--equilibrium dynamics in the low temperature regime where activation plays an essential role.

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