Motion and capture of quasiparticles in solids in the presence of cooperative trap interactions

The motion and capture of quasiparticles in periodic lattices are investigated with the help of a calculation which is exact in a one-dimensional system, and whose special feature is that it treats cooperative interactions among traps. These interactions are analyzed through lattice gas arguments. The motion is studied with the help of generalized master equations which allow for an arbitrary degree of transport coherence. The analysis, although of particular relevance to the dynamics of Frenkel excitons in molecular solids, is of general applicability.