Quantifying Spatially Heterogeneous Dynamics in Computer Simulations of   Glassforming Liquids
  We examine the phenomenon of dynamical heterogeneity in computer simulations of an equilibrium, glass-forming liquid. We describe several approaches to quantify the spatial correlation of single-particle motion, and show that spatial correlations of particle displacements become increasingly long-range as the temperature decreases toward the mode coupling critical temperature. 
Sharon C. Glotzer and Claudio Donati