Decoherence in a Double-Dot Aharonov-Bohm Interferometer
Mesoscale and Nanoscale Physics
2010-11-17 v1
Abstract
Coherence in electronic interferometers is typically believed to be restored fully in the limit of small voltages, frequencies and temperatures. However, it is crucial to check this essentially perturbative argument by nonperturbative methods. Here, we use the numerical renormalization group to study ac transport and decoherence in an experimentally realizable model interferometer, a parallel double quantum dot coupled to a phonon mode. The model allows to clearly distinguish renormalization effects from decoherence. We discuss finite frequency transport and confirm the restoration of coherence in the dc limit.
Cite
@article{arxiv.1011.3518,
title = {Decoherence in a Double-Dot Aharonov-Bohm Interferometer},
author = {Björn Kubala and David Roosen and Michael Sindel and Walter Hofstetter and Florian Marquardt},
journal= {arXiv preprint arXiv:1011.3518},
year = {2010}
}
Comments
4+ pages, 3 figures