Weak Charge Quantization as an Instanton of Interacting sigma-model
Mesoscale and Nanoscale Physics
2009-01-23 v2
Abstract
Coulomb blockade in a quantum dot attached to a diffusive conductor is considered in the framework of the non-linear sigma-model. It is shown that the weak charge quantization on the dot is associated with instanton configurations of the Q-field in the conductor. The instantons have a finite action and are replica non--symmetric. It is argued that such instantons may play a role in the transition regime to the interacting insulator.
Cite
@article{arxiv.cond-mat/0002385,
title = {Weak Charge Quantization as an Instanton of Interacting sigma-model},
author = {Alex Kamenev},
journal= {arXiv preprint arXiv:cond-mat/0002385},
year = {2009}
}
Comments
4 pages. The 2D case substantially modified