Electrically driven spin resonance is a powerful technique for controlling semiconductor spin qubits. However, it faces challenges in qubit addressability and off-resonance driving in larger systems. We demonstrate coherent bichromatic Rabi control of quantum dot hole spin qubits, offering a spatially selective approach for large qubit arrays. By applying simultaneous microwave bursts to different gate electrodes, we observe multichromatic resonance lines and resonance anticrossings that are caused by the ac Stark shift. Our theoretical framework aligns with experimental data, highlighting interdot motion as the dominant mechanism for bichromatic driving.
@article{arxiv.2308.01720,
title = {Bichromatic Rabi Control of Semiconductor Qubits},
author = {Valentin John and Francesco Borsoi and Zoltán György and Chien-An Wang and Gábor Széchenyi and Floor van Riggelen and William I. L. Lawrie and Nico W. Hendrickx and Amir Sammak and Giordano Scappucci and András Pályi and Menno Veldhorst},
journal= {arXiv preprint arXiv:2308.01720},
year = {2025}
}