COMPUTER-SIMULATION OF EXCITONIC OPTICAL-LINE SHAPES - TRANSFER INTEGRAL FLUCTUATIONS WITH DICHOTOMIC COLORED NOISE

For Frenkel excitons moving on cyclic and linear molecular chains (mod eling in part photosynthetic antenna systems) we investigate the influ ence of dynamic and static disorder on their optical line shapes. The dynamic disorder describes the influence of vibrational degrees of fre edom. In our recent papers we have taken into account fluctuations of the local excitation energy. Fluctuations of the transfer matrix eleme nt between neighbouring molecules will be treated in this paper. The f luctuations are represented by dichotomic Markov processes with colour ed noise. We obtain a closed set of equations of motion for the correl ation functions determining the optical line shape which is solved exa ctly. The line shapes are discussed for various sets of the model para meters.