Weak Charge Quantization as an Instanton of Interacting sigma-model

Preprint

5 July 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0002385

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.

Keywords

WEAK CHARGE QUANTIZATION
INTERACTING SIGMA
SIGMA MODEL
QUANTUM DOT
INSTANTONS
COULOMB

All Related Versions

Version 1, 2000-02-24, ArXiv
Version 2, 2000-07-05, ArXiv
Published version: Physical Review Letters, 85 (19), 4160.

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