Landau-Zener transitions in a semiconductor quantum dot

G. E. MURGIDA; D. A. WISNIACKI; P. I. TAMBORENEA

JOURNAL OF MODERN OPTICS

TAYLOR & FRANCIS LTD

Año: 2009 vol. 56 p. 799 - 804

0950-0340

We study the transitions between neighboring energy levels in a quasi-one-dimensional semi-conductor quantum dot with two interacting electrons in it, when it is subject to a linearlytime-dependent electric field. We analyze the applicability of simple two-level Landau-Zenermodel to describe the evolution of the probability amplitudes in this realistic system. Weshow that the Landau-Zener model works very well when it is viewed in the adibatic basis,but it is not as robust in the diabatic basis.