Dephasing in quantum dot molecules via exciton-acoustic phonon coupling

Details Dephasing in quantum dot molecules via exciton-acoustic phonon coupling Dephasing in quantum dot molecules via exciton-acoustic phonon coupling

2005-04-14

arxiv.org/abs/cond-mat/0504372v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We develop a theory of the linear optical spectrum of excitons in quantum dot molecules, including the effect of exciton-phonon coupling beyond the Markov limit. The model reproduces the general trend of the zero-phonon line broadening as a function of interdot distance, that were recently measured. The unexpectedly broad linewidths and their large variation are explained in terms of both the non-Markov nature of the coupling and of the matching of the phonon wavelength to the interdot distance.

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