Hyperfine interaction mediated electric-dipole spin resonance: the role of frequency modulation

Hyperfine-mediated gate-driven electron spin resonance.

An all-electrical spin resonance effect in a GaAs few-electron double quantum dot is investigated experimentally and theoretically. The magnetic field dependence and absence of associated Rabi oscillations are consistent with a novel hyperfine mechanism. The resonant frequency is sensitive to the instantaneous hyperfine effective field, and the effect can be used to detect and create sizable nu...

Supplementary Information: Electric Dipole Induced Spin Resonance in Disordered Semiconductors

Here, we give a more detailed account of the evaluation of the polarization S (ω), Eq. (A11) of the Article, in terms of the spin-spin and the spin-momentum terms, X , Y , respectively, and the spin vertex correction Σ. The simultaneous presence of the internal and external fields, α(p × ez) and b0, resp., breaks the symmetry in orbital space such that no closed analytical expression for the in...

Controlling a nanowire spin-orbit qubit via electric-dipole spin resonance.

A semiconductor nanowire quantum dot with strong spin-orbit coupling (SOC) can be used to achieve a spin-orbit qubit. In contrast to a spin qubit, the spin-orbit qubit can respond to an external ac electric field, an effect called electric-dipole spin resonance. Here we develop a theory that can apply in the strong SOC regime. We find that there is an optimal SOC strength η(opt)=√2/2, where the...

Quantum-Dot Spin Qubit and Hyperfine Interaction

We review our investigation of the spin dynamics for two electrons confined to a double quantum dot under the influence of the hyperfine interaction between the electron spins and the surrounding nuclei. Further we propose a scheme to narrow the distribution of difference in polarization between the two dots in order to suppress hyperfine induced decoherence.

Theory of electric dipole spin resonance in a parabolic quantum well