Computer simulation of the exciton transfer in the coupled ring antenna subunits of bacteria photosynthetic systems

A commonly accepted feature of the purple bacteria antenna systems seems to be a ring structure of their subunits LH2 and LH1. We concentrate our inve stigation on an energy delivery time through the LH2 and LH1 to the reactio n center. Our model system consists of one LH2, one LH1 and RC. We have use d structure data from Rps. acidophila. We investigate the exciton transfer from LH2 to LH1 and consequently to RC under the influence of a bath with t he presence of a trap in RC. (C) 1999 Elsevier Science B.V. All rights rese rved.