Transmission in double quantum dots in the Kondo regime: Quantum-critical transitions and interference effects
Mesoscale and Nanoscale Physics
2009-09-29 v2 Strongly Correlated Electrons
Abstract
We study the transmission through a double quantum-dot system in the Kondo regime. An exact expression for the transmission coefficient in terms of fully interacting many-body Green's functions is obtained. By mapping the system into an effective Anderson impurity model, one can determine the transmission using numerical renormalization-group methods. The transmission exhibits signatures of the different Kondo regimes of the effective model, including an unusual Kondo phase with split peaks in the spectral function, as well as a pseudogapped regime exhibiting a quantum critical transition between Kondo and unscreened phases.
Cite
@article{arxiv.0708.0539,
title = {Transmission in double quantum dots in the Kondo regime: Quantum-critical transitions and interference effects},
author = {Luis G. Dias da Silva and Nancy Sandler and Kevin Ingersent and Sergio E. Ulloa},
journal= {arXiv preprint arXiv:0708.0539},
year = {2009}
}
Comments
4 pages, 3 figures; Submitted to Physica E (EP2DS-17 proceedings, oral presentation), updated Refs