Non-adiabatic current generation in a finite width semiconductor ring

TL;DR

This paper demonstrates how a short, intense Tera-Hertz pulse can generate a non-adiabatic current in a finite-width semiconductor quantum ring, comparable to persistent currents.

Contribution

It introduces a method to generate significant non-adiabatic currents in semiconductor rings using short Tera-Hertz pulses, expanding control over quantum ring currents.

Findings

Non-adiabatic current can reach the magnitude of persistent current.

Short Tera-Hertz pulses effectively induce current in quantum rings.

The method offers a new way to manipulate quantum ring currents.

Abstract

We consider a model of a semiconductor quantum ring of finite width in a constant perpendicular magnetic field. We show how a current of the same order as the persistent current can be generated non-adiabatically by a short intensive pulse in the Tera-Hertz regime.