Phonon-induced exciton dephasing in quantum dot molecules.

  title={Phonon-induced exciton dephasing in quantum dot molecules.},
  author={E. A. Muljarov and Toshihide Takagahara and Roland Zimmermann},
  journal={Physical review letters},
  volume={95 17},
A new microscopic approach to the optical transitions in quantum dots and quantum dot molecules, which accounts for both diagonal and nondiagonal exciton-phonon interaction, is developed. The cumulant expansion of the linear polarization is generalized to a multilevel system and is applied to calculation of the full time dependence of the polarization and the absorption spectrum. In particular, the broadening of zero-phonon lines is evaluated directly and discussed in terms of real and virtual… CONTINUE READING

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