Phonon-assisted decoherence and tunneling in quantum dot molecules
Mesoscale and Nanoscale Physics
2015-05-20 v1
Abstract
We study the influence of the phonon environment on the electron dynamics in a doped quantum dot molecule. A non-perturbative quantum kinetic theory based on correlation expansion is used in order to describe both diagonal and off-diagonal electron-phonon couplings representing real and virtual processes with relevant acoustic phonons. We show that the relaxation is dominated by phonon-assisted electron tunneling between constituent quantum dots and occurs on a picosecond time scale. The dependence of the time evolution of the quantum dot occupation probabilities on the energy mismatch between the quantum dots is studied in detail.
Keywords
Cite
@article{arxiv.1011.2857,
title = {Phonon-assisted decoherence and tunneling in quantum dot molecules},
author = {A. Grodecka-Grad and J. Förstner},
journal= {arXiv preprint arXiv:1011.2857},
year = {2015}
}
Comments
4 pages, 2 figures, conference proceeding NOEKS10, to be published in Phys. Stat. Sol