Resonant harmonic generation and collective spin rotations in electrically driven quantum dots

Abstract

Spin rotations induced by an AC electric field in a two-electron double quantum dot are studied by an exact numerical solution of the time dependent Schroedinger equation in the context of recent electric dipole spin resonance experiments based on the Pauli blockade. We demonstrate that the splitting of the main resonance line by the spin exchange coupling is accompanied by the appearance of fractional resonances and that both these effects are triggered by interdot tunnel coupling. We find that the AC driven system generates residual but distinct harmonics of the driving frequency which are amplified when tuned to the main transition frequency. The mechanism is universal for electron systems in electrically driven potentials and works also in the absence of electron-electron interaction or spin-orbit coupling.

Corrected version accepted for PRB

References in corpus (8)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Coherent control of a single electron spin with electric fields
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Orbital mechanisms of electron spin manipulation by an electric field
• Hyperfine-mediated gate-driven electron spin resonance
• Spin dynamics in a strongly driven system: very slow Rabi oscillations
• Detection of single electron spin resonance in a double quantum dot
• Time dependent configuration interaction simulations of spin swap in spin orbit coupled double quantum dots

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• Controllable single spin evolution at sub-harmonics of electric dipole spin resonance enhanced by four-level Landau-Zener-St{ü}ckelberg-Majorana interference
• Single-electron shell occupation and effective $g$-factor in few-electron nanowire quantum dots