Abstract
The theory of Frenkel molecular excitons is extended to include the effect of retardation , in the dipole approximation, on the mixing of exciton bands arising from different electronic states. The Hamiltonian does not contain any instantaneous intermolecular interactions and treats exciton-photon and intermolecular interactions on an equal footing. The exciton energy levels are calculated to the fourth order in electronic charge using graphs of the time-ordered type and it is shown that retardation results in a replacement of instantaneous dipole potentials by retarded resonance potentials. A number of results for a system of three identical molecules with one in an excited state are calculated simultaneously.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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