Connecting microscopic simulations with kinetically constrained models of glasses.
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 disk glass former onto a kinetically constrained spin model, providing an attempt at bridging these two approaches.
Downton
Matthew T
MT
Physics Department, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6.
Kennett
Malcolm P
MP