Abstract
Computer simulation of absorption and steady state fluorescence spectra for molecular system is presented. We focus on the B850 ring from peripheral cyclic antenna unit LH2 of the bacterial photosystem from purple bacteria. Uncorrelated static disorder in radial positions of molecules on the ring is taking into account in our simulations. We consider also influence of dynamic disorder, interaction with phonon bath, in Markovian approximation. Spectral responses are calculated by the cumulant-expansion method of Mukamel et al. Procedure in Fortran was created for calculation of single ring spectra within full Hamiltonian model. These new results are compared with our previous ones (within the nearest neighbour approximation model) that were obtained by software package Mathematica.
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