Bichromatic Rabi Control of Semiconductor Qubits

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.Received 4 August 2023Accepted 20 October 2023DOI:https://doi.org/10.1103/PhysRevLett.132.067001© 2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasQuantum information with solid state qubitsPhysical SystemsNanostructuresQuantum dotsQuantum wellsPropertiesSpinCondensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology