Spin-orbit-driven coherent oscillations in a few-electron quantum dot

TL;DR

This paper proposes an experiment to observe spin-orbit-driven coherent oscillations in a quantum dot, using gate pulses to modulate spin-orbit coupling, with a theoretical model predicting GHz Rabi frequencies.

Contribution

It introduces a novel method to induce and analyze coherent oscillations in quantum dots via spin-orbit interaction without spin-polarized leads.

Findings

Predicted Rabi frequency of 2 GHz for InGaAs quantum dots.

Derived an effective model equivalent to the Jaynes-Cummings model.

Proposed experimental setup for observing spin-orbit-driven oscillations.

Abstract

We propose an experiment to observe coherent oscillations in a single quantum dot with the oscillations driven by spin-orbit interaction. This is achieved without spin-polarised leads, and relies on changing the strength of the spin-orbit coupling via an applied gate pulse. We derive an effective model of this system which is formally equivalent to the Jaynes-Cummings model of quantum optics. For parameters relevant to a InGaAs dot, we calculate a Rabi frequency of 2 GHz.