We theoretically investigate electron transport through an Aharonov-Bohm interferometer containing laterally coupled double quantum dots. We introduce the indirect coupling parameter α, which characterizes the strength of the coupling via the reservoirs between two quantum dots. ∣α∣=1 indicates the strongest coupling, where only a single mode contributes to the transport in the system. Two conduction modes exist in a system where ∣α∣=1. The interference effects such as the Fano resonance and the Aharonov-Bohm oscillation are suppressed as the absolute value of the parameter α decreases from 1. The linear conductance does not depend on the flux when α=0 since it corresponds to independent coupling of the dots to the reservoir modes.
@article{arxiv.cond-mat/0602539,
title = {Electron transport through Aharonov-Bohm interferometer with laterally coupled double quantum dots},
author = {Toshihiro Kubo and Yasuhiro Tokura and Tsuyoshi Hatano and Seigo Tarucha},
journal= {arXiv preprint arXiv:cond-mat/0602539},
year = {2009}
}