The Ohmic conductance and current through two quantum dots in series is investigated for the case of incoherent tunnelling. A generalised master equation is employed to include the discrete nature of the energy levels. Regions of negative differential conductance can occur in the I-V characteristics. Transport is dominated by matching energy levels, even when they do not occur at the charge degeneracy points.
@article{arxiv.cond-mat/9601156,
title = {Incoherent tunnelling through two quantum dots with Coulomb interaction},
author = {P. Pals and A. MacKinnon},
journal= {arXiv preprint arXiv:cond-mat/9601156},
year = {2009}
}