Connecting microscopic simulations with kinetically constrained models of glasses

Details Connecting microscopic simulations with kinetically constrained models of glasses Connecting microscopic simulations with kinetically constrained models of glasses

2007-04-12

arxiv.org/abs/0704.1497v3

Phys. Rev. E 76, 031502 (2007)

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 5 figures, revised version

Scientific paper

10.1103/PhysRevE.76.031502

Kinetically constrained spin models are known to exhibit dynamical behavior mimicking that of glass forming systems. They are often understood as coarse-grained models of glass formers, in terms of some "mobility" field. The identity of this "mobility" field has remained elusive due to the lack of coarse-graining procedures to obtain these models from a more microscopic point of view. Here we exhibit a scheme to map the dynamics of a two-dimensional soft disc glass former onto a kinetically constrained spin model, providing an attempt at bridging these two approaches.

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