Landau–Zener transitions in a semiconductor quantum dot

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