We study charge transport through a chain of quantum dots. The dots are fully coherent among each other and weakly coupled to metallic electrodes via the dots at the interface, thus modelling a molecular wire. If the non-local Coulomb interactions dominate over the inter-dot hopping we find strongly enhanced shot noise above the sequential tunneling threshold. The current is not enhanced in the region of enhanced noise, thus rendering the noise super-Poissonian. In contrast to earlier work this is achieved even in a fully symmetric system. The origin of this novel behavior lies in a competition of "slow" and "fast" transport channels that are formed due to the differing non-local wave functions and total spin of the states participating in transport. This strong enhancement may allow direct experimental detection of shot noise in a chain of lateral quantum dots.
@article{arxiv.cond-mat/0505345,
title = {Strongly enhanced shot noise in chains of quantum dots},
author = {J. Aghassi and A. Thielmann and M. H. Hettler and G. Schön},
journal= {arXiv preprint arXiv:cond-mat/0505345},
year = {2009}
}