Power dependence of electric dipole spin resonance

TL;DR

This paper develops a formalism for electric dipole spin resonance (EDSR) considering slanting magnetic fields, revealing different Rabi frequency behaviors in harmonic versus double-well potentials as microwave amplitude varies.

Contribution

It introduces a new formalism for EDSR with slanting magnetic fields and analyzes microwave amplitude effects on Rabi frequency in different confinement potentials.

Findings

Linear Rabi frequency increase in harmonic potential

Sub-linear Rabi frequency increase in double-well potential

Dependence of Rabi frequency on confinement potential shape

Abstract

We develop a formalism of electric dipole spin resonance (EDSR) based on slanting magnetic field, where we especially investigate the microwave amplitude dependence. With increasing microwave amplitude, the Rabi frequency increases linearly for a spin confined in a harmonic potential. How- ever, when the spin is confined in the double-well potential, the Rabi frequency shows sub-linear dependence with increasing the microwave amplitude.