Quantum control using diabatic and adiabatic transitions

TL;DR

This paper explores quantum control techniques using Landau-Zener transitions at avoided crossings to manipulate the states of two interacting electrons in a semiconductor system.

Contribution

It demonstrates how diabatic and adiabatic transitions can be employed for precise quantum state control in a realistic two-electron system.

Findings

Controlled state transfer via Landau-Zener transitions

Effective manipulation of electron states in semiconductor systems

Potential applications in quantum information processing

Abstract

We exploit the concept of Landau-Zener transitions at avoided energy crossings as a quantum-control tool. In an avoided crossing the two quantum states interchange their characteristics as an external parameter is varied. Depending on the rate of change of the parameter it is possible to control the final state. We use this simple idea to travel along the energy spectrum of a realistic system: two interacting electrons confined in a quasi-one-dimensional semiconductor system.