THEORY OF EXCITONIC OPTICAL-LINE SHAPES OF CYCLIC AND LINEAR HEXAMERS - INFLUENCE OF DICHOTOMIC COLORED NOISE

For Frenkel excitons moving on cyclic and linear molecular hexamers we investigate the influence of dynamic and static disorder on their optical line shapes. The dynamic disorder describes the influence of vibrational degrees of freedom and is taken into account by fluctuations of the local excitation energy and of the transfer matrix element between neighbouring molecules. The fluctuations are represented by dichotomic Markov processes with colored noise. We obtain a closed set of equations of motion for the correlation functions determining the optical line shape which is solved exactly. The line shapes are discussed for various sets of model parameters as well as various arrangements of molecules and their transition dipole moments.