Gated combo nanodevice for sequential operations on single electron spin

TL;DR

This paper proposes a nanodevice capable of performing a sequence of quantum gates on a single electron spin, utilizing spin-orbit coupling and electron wave function control, with simulation results demonstrating its operation.

Contribution

It introduces a novel nanodevice design that enables sequential quantum gate operations on a single electron spin using spin-orbit effects and wave function self-focusing.

Findings

Successful simulation of quantum gate sequences on electron spin

Control of electron trajectory via wave function self-focusing

Potential for scalable quantum computing components

Abstract

An idea for a nanodevice in which an arbitrary sequence of three basic quantum single qubit gates - negation, Hadamard and phase shift - can be performed on a single electron spin. The spin state is manipulated using the spin-orbit coupling and the electron trajectory is controlled by the electron wave function self-focusing mechanism due to the electron interaction with the charge induced on metal gates. We present results of simulations based on iterative solution of the time dependent Schr\"odinger equation in which the subsequent operations on the electron spin can be followed and controlled. Description of the moving electron wave packet requires evaluation of the electric field within the entire nanodevice in each time step.