Bichromatic Rabi Control of Semiconductor Qubits

TL;DR

This paper introduces a bichromatic Rabi control method for semiconductor spin qubits, enabling spatially selective manipulation in large qubit arrays through simultaneous microwave driving, supported by experimental and theoretical analysis.

Contribution

It presents a novel bichromatic control technique for quantum dot hole spin qubits, addressing addressability challenges in large-scale quantum systems.

Findings

Observation of multichromatic resonance lines

Resonance anticrossings caused by ac Stark shift

Theoretical model matches experimental data

Abstract

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.