INTERPLAY OF CREATION, PROPAGATION, AND RELAXATION OF AN EXCITATION IN A DIMER

Interplay of simultaneous creation, annihilation, propagation, and rel axation of an excitation in molecular condensates interacting with an ultrashort quantum optical pulse is studied in general and specialized to a dimer. A microscopic model appropriate for such systems (with a strong exciton-phonon coupling) is presented. It also incorporates eff ects of (quantum) noise in the optical field. A variety of new feature s in the initial stage of excitation dynamics (when it is being create d) is revealed; a strong influence of the coherent excitation propagat ion on the processes of excitation creation and annihilation in a mole cule strongly interacting with phonons is the most remarkable one. (C) 1998 Elsevier Science B.V. All rights reserved.