Single qubit gates with a charged quantum dot using minimal resources

TL;DR

This paper demonstrates high-fidelity single-qubit gates on an electron spin in a quantum dot using minimal optical resources and a strong laser field, suitable for systems with limited optical access.

Contribution

It introduces a method for coherent control of a single electron spin in a quantum dot with minimal resources, enabling reliable quantum gates under realistic experimental conditions.

Findings

High-fidelity arbitrary spin rotations achieved

Single laser mode suffices for coherent control

Applicable to systems with restricted optical resources

Abstract

We investigate coherent control of a single electron trapped in a semiconductor quantum dot. Control is enabled with a strong laser field detuned with respect to the electron light-hole optical transitions. For a realistic experimental situation, i.e. with a weak magnetic field applied along the growth direction, high fidelity arbitrary rotations of the electron spin are possible using a single laser spatial mode. This makes viabile quantum gates with electron spins in systems with restricted optical resources.