Interplay of exciton or electron transfer and relaxation

V. Čápek

Physica A: Statistical Mechanics and its Applications, 1994, vol. 203, issue 3, 520-532

Abstract: Tokuyama-Mori theory together with canonical transformation but with quantities of interest remaining untransformed is applied to the exciton- or electron-phonon system with site-diagonal linear coupling and full exciton or electron density matrix; finite concentrations of the carriers are admitted. The result is applied to a particle on a symmetric dimer. In contrast to recent calculations showing that time-convulution (Mori or generalized master equation) second-order (in coupling to phonons) approaches fail in providing genuine relaxation, independent (up to the initial time interval) of the degree of initial polaron formation, the Tokuyama-Mori theory is illustrated to be fully acceptable in this respect. Correspondence with a recent generalization of the Haken-Strobl-Reineker model is found.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:203:y:1994:i:3:p:520-532

DOI: 10.1016/0378-4371(94)90013-2

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