Fast and robust spin manipulation in a quantum dot by electric fields

TL;DR

This paper presents a method to rapidly and reliably flip electron spins in quantum dots using electric fields, enhancing quantum information processing by reducing decoherence.

Contribution

The paper introduces an invariant-based inverse engineering approach for fast, robust spin control in quantum dots via electric fields, avoiding decoherence.

Findings

Achieved rapid spin flips using designed electric fields

Method is robust against device-dependent noise

Potential for improved spin-based quantum computing

Abstract

We apply an invariant-based inverse engineering method to control by time-dependent electric fields electron spin dynamics in a quantum dot with spin-orbit coupling in a weak magnetic field. The designed electric fields provide a shortcut to adiabatic processes that flips the spin rapidly, thus avoiding decoherence effects. This approach, being robust with respect to the device-dependent noise, can open new possibilities for the spin-based quantum information processing.