Squeezed states in the trimer problem

Eiermann, H.; Wagner, M.
October 1996
Journal of Chemical Physics;10/22/1996, Vol. 105 Issue 16, p6713
Academic Journal
In the present work we study unconventional (‘‘squeezed’’) exciton–phonon states in the trimer model. These quasifree states, which do not undergo self-trapping, are characterized by a nearly vanishing lattice distortion and a stiffening in the phonon part as well as a large amount of kinetic energy in the excitonic subsystem. In contrast, the ‘‘conventional’’ exciton–phonon states are characterized by a strong lattice distortion and physically amount to a self-trapping of the exciton. In the trimer model a third type of exciton–phonon states have been found, which are a kind of ‘‘dimerized’’ states, where self-trapping has taken place only partially. The different types of states are analyzed and discussed. © 1996 American Institute of Physics.


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