Title: Many-body effects and quantum coherence in electron transport through quantum dots

Authors: Ramon Aguado

Addresses: Departamento de Teoria de la Materia Condensada, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco, Madrid 28049, Spain

Abstract: In this paper, I briefly review some recent aspects of electron transport through lateral quantum dots in the few-electron regime. These systems are very useful in studying a wide range of fascinating phenomena. Many of these phenomena originate from the intricate interplay between electron interactions and quantum coherence. In particular, I describe recent developments concerning Kondo physics in quantum dots and the realisation of charge qubits in double quantum dots. These two examples illustrate how recent experimental advances in transport studies of quantum dots provide us with an excellent testing ground to study fundamental problems of condensed-matter physics (for instance, the physics of correlated electrons and quantum dissipation) with unprecedented control. Some of the effects appearing in nanostructures have no counterpart in conventional systems. The nanotechnology for fabricating and measuring sophisticated devices now exists and may soon help us to gain new insights into a number of fundamental physical concepts related to correlations and quantum coherence in low dimensions.

Keywords: lateral semiconductor quantum dots; electron transport; Coulomb blockade; Kondo effect; qubits; quantum dissipation; decoherence; quantum noise; nanotechnology; Spain; many-body effects; quantum coherence; nanostructures.

DOI: 10.1504/IJNT.2005.006979

International Journal of Nanotechnology, 2005 Vol.2 No.1/2, pp.129 - 143

Published online: 30 Apr 2005 *

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