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

Gudmundsson, Vidar; Gudmundsdottir, Gudny; Bardarson, Jens Hjorleifur; Magnusdottir, Ingibjorg; Tang, Chi-Shung; Manolescu, Andrei

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

Authors

Gudmundsson, Vidar

Gudmundsdottir, Gudny

Bardarson, Jens Hjorleifur

Magnusdottir, Ingibjorg

Tang, Chi-Shung

Manolescu, Andrei

Description

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.
RevTeX, 7 pages with included postscript figures