Coherence effects in triplet-exciton transport via time-dependent delayed fluorescence

We develop a theory for experiments on triplet-exciton transport involving the measurement of the evolution of spatially periodic inhomogeneities in the exciton population with the help of observations of delayed fluorescence. The theory is based on generalized master equations and therefore allows the study of explicit effects of transport coherence for arbitrary degree of coherence. A specific application to one-dimensional crystals is also given with detailed prescriptions to extract relevant transport parameters from experiments.