Coherent control of interacting electrons in quantum dots via navigation in the energy spectrum

TL;DR

This paper demonstrates quantum control of two interacting electrons in quantum dots using energy spectrum navigation, employing adiabatic and diabatic techniques to reach target states far from the initial state.

Contribution

It introduces a method for controlling electron wave functions in quantum dots by leveraging energy spectrum features and transition strategies.

Findings

Successful implementation of adiabatic and diabatic control methods.

Ability to reach target states far in the energy spectrum.

System behaves as a two-level system at avoided crossings.

Abstract

Quantum control of the wave function of two interacting electrons confined in quasi-one-dimensional double-well semiconductor structures is demonstrated. The control strategies are based on the knowledge of the energy spectrum as a function of an external uniform electric field. When two low-lying levels have avoided crossings our system behaves dynamically to a large extent as a two-level system. This characteristic is exploited to implement coherent control strategies based on slow (adiabatic passage) and rapid (diabatic Landau-Zener transition) changes of the external field. We apply this method to reach desired target states that lie far in the spectrum from the initial state.