Landscapes, dynamic heterogeneity and kinetic facilitation in a simple   off-lattice model
  We present a simple off-lattice hard-disc model that exhibits glassy dynamics. The inherent structures are enumerated exactly, transitions between metabasins are well understood, and the particle configurations that act to facilitate dynamics are easily identified. The model readily maps to a coarse grained dynamic facilitation description. 
R. K. Bowles and I. Saika-Voivod