Eur. Phys. J. B 45, 339-345 (2005)
https://doi.org/10.1140/epjb/e2005-00191-6

Multi-mode transport through a quantum nanowire with two embedded dots

¹ Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland
² Physics Division, National Center for Theoretical Sciences, P.O. Box 2-131, Hsinchu 30013, Taiwan

Corresponding author: ^a vidar@raunvis.hi.is

Received: 1 December 2004
Revised: 8 March 2005
Published online: 6 July 2005

Abstract

We investigate the conductance of a quantum wire with two embedded quantum dots using a T-matrix approach based on the Lippmann-Schwinger formalism. The quantum dots are represented by a quantum well with Gaussian shape and the wire is two-dimensional with parabolic confinement in the transverse direction. In a broad wire the transport can assume a strong nonadiabatic character and the conductance manifests effects caused by intertwined inter- and intra-dot processes that are identified by analysis of the “nearfield” probability distribution of the transported electrons.