Bichromatic Rabi Control of Semiconductor Qubits
V. John (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Veldhorst Lab)
F. Borsoi (TU Delft - QCD/Veldhorst Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
Zoltan György (Eötvös University)
C.A. Wang (TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Veldhorst Lab, Kavli institute of nanoscience Delft)
Gábor Széchenyi (Eötvös University)
F. van Riggelen (TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
William I.L. Lawrie (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab)
N. W. Hendrickx (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
A. Sammak (TU Delft - BUS/TNO STAFF, TU Delft - QuTech Advanced Research Centre)
G. Scappucci (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Scappucci Lab)
András Pályi (Budapest University of Technology and Economics)
M. Veldhorst (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QN/Veldhorst Lab)
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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.