Bichromatic Rabi Control of Semiconductor Qubits
Valentin John (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
Francesco Borsoi (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
Zoltán György (Eötvös Loránd University)
Chien An Wang (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
Gábor Széchenyi (Eötvös Loránd University)
Floor Van Riggelen-Doelman (TU Delft - QCD/Veldhorst Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
William I.L. Lawrie (Kavli institute of nanoscience Delft, TU Delft - QCD/Veldhorst Lab, TU Delft - QuTech Advanced Research Centre)
Nico W. Hendrickx (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Veldhorst Lab)
Amir Sammak (TU Delft - QuTech Advanced Research Centre, TU Delft - BUS/TNO STAFF)
Giordano Scappucci (TU Delft - QCD/Scappucci Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
András Pályi (Budapest University of Technology and Economics)
Menno Veldhorst (TU Delft - QN/Veldhorst Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
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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.