Dynamics on the Way to Forming Glass: Bubbles in Space-time

Details Dynamics on the Way to Forming Glass: Bubbles in Space-time Dynamics on the Way to Forming Glass: Bubbles in Space-time

2009-08-04

arxiv.org/abs/0908.0418v1

Annu. Rev. Phys. Chem. 61, 191 (2010)

Physics

Condensed Matter

Soft Condensed Matter

21 pages, 8 figures. Submitted to Annu. Rev. Phys. Chem

Scientific paper

10.1146/annurev.physchem.040808.

We review a theoretical perspective of the dynamics of glass forming liquids and the glass transition. It is a perspective we have developed with our collaborators during this decade. It is based upon the structure of trajectory space. This structure emerges from spatial correlations of dynamics that appear in disordered systems as they approach non-ergodic or jammed states. It is characterized in terms of dynamical heterogeneity, facilitation and excitation lines. These features are associated with a newly discovered class of non-equilibrium phase transitions. Equilibrium properties have little if anything to do with it. The broken symmetries of these transitions are obscure or absent in spatial structures, but they are vivid in space-time (i.e., trajectory space). In our view, the glass transition is an example of this class of transitions. The basic ideas and principles we review were originally developed through the analysis of idealized and abstract models. Nevertheless, the central ideas are easily illustrated with reference to molecular dynamics of more realistic atomistic models, and we use that illustrative approach here.

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