Superposition of photon- and phonon- assisted tunneling in coupled quantum dots
Mesoscale and Nanoscale Physics
2009-10-31 v2
Abstract
We report on electron transport through an artificial molecule formed by two tunnel coupled quantum dots, which are laterally confined in a two-dimensional electron system of an AlGaAs/GaAs heterostructure. Coherent molecular states in the coupled dots are probed by photon-assisted tunneling (PAT). Above 10 GHz, we observe clear PAT as a result of the resonance between the microwave photons and the molecular states. Below 8 GHz, a pronounced superposition of phonon- and photon-assisted tunneling is observed. Coherent superposition of molecular states persists under excitation of acoustic phonons.
Keywords
Cite
@article{arxiv.cond-mat/0011155,
title = {Superposition of photon- and phonon- assisted tunneling in coupled quantum dots},
author = {H. Qin and A. W. Holleitner and K. Eberl and R. H. Blick},
journal= {arXiv preprint arXiv:cond-mat/0011155},
year = {2009}
}
Comments
5 pages, 4 figures