Ultrafast exciton dynamics in molecular systems
The theory of subpicosecond Frenkel exciton dynamics in molecular systems is reviewed with emphasis on a stepwise imp loved description of the coupling to intra- and intermolecular vibrations. After introducing the concept of multiexciton states the motion of electronic Frenkel excitons as they appear in light harvesting antennae of photosynthetic organisms is discussed. The description is based o