Is the quantum dot at large bias a weak-coupling problem?
Mesoscale and Nanoscale Physics
2009-10-31 v3
Abstract
We examine the two-lead Kondo model for a d.c. biased quantum dot in the Coulomb blockade regime. From perturbative calculations of the magnetic susceptibility, we show that the problem retains its strong-coupling nature, even at bias voltages larger than the equilibrium Kondo temperature. We give a speculative discussion of the nature of the renormalization group flows and the strong-coupling state that emerges at large voltage bias.
Cite
@article{arxiv.cond-mat/0012005,
title = {Is the quantum dot at large bias a weak-coupling problem?},
author = {P. Coleman and C. Hooley and O. Parcollet},
journal= {arXiv preprint arXiv:cond-mat/0012005},
year = {2009}
}
Comments
Four pages with embedded figures; references added; minor changes to the text