Quantum dots as scatterers in electronic transport : interference and correlations

TL;DR

This paper investigates how quantum dots attached to a wire affect electronic conductance, highlighting the roles of quantum interference, electron correlations, and the Kondo effect in shaping conductance features.

Contribution

It distinguishes between classical and many-body Fano resonances and analyzes how electron-electron interactions modify the resonance shape in quantum dot systems.

Findings

Identification of differences between classical and many-body Fano resonances

Analysis of electron-electron interactions on Fano resonance shape

Insights into quantum interference effects in quantum dot conductance

Abstract

Conductance through a system consisting of a wire with side-attached quantum dots is calculated. Such geometry of the device allows to study the coexistence of quantum interference, electron correlations and their influence on conductance. We underline the differences between "classical" Fano resonance in which the resonant channel is of single-particle nature and "many-body" Fano resonance with the resonant channel formed by Kondo effect. The influence of electron-electron interactions on the Fano resonance shape is also analyzed.