Transport in multilevel quantum dots: from the Kondo effect to the Coulomb blockade regime

TL;DR

This paper introduces a new theoretical approach to analyze electron transport in multilevel quantum dots, effectively capturing both Coulomb blockade and Kondo effects across different coupling regimes.

Contribution

A novel theoretical method is developed that accurately describes electron transport in multilevel quantum dots, unifying Coulomb blockade and Kondo phenomena.

Findings

Correct behavior in weak and strong coupling limits

Density of states and conductance results for two-level dots

Relevance to recent experimental observations

Abstract

A new theoretical method is introduced to study coherent electron transport in an interacting multilevel quantum dot. The method yields the correct behavior both in the limit of weak and strong coupling to the leads, giving a unified description of Coulomb blockade and the Kondo effect. Results for the density of states and the temperature dependent conductance for a two- level dot are presented. The relevance of these results in connection to recent experiments on the Kondo effect in semiconducting quantum dots is discussed.