A transmon qudit using Ramsey interferometry infers on-chip microwave amplitude and frequency from ac Stark shifts of the first two transitions, enabling broadband transfer function characterization.
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Amplitude and frequency sensing of microwave fields with a superconducting transmon qudit
A transmon qudit using Ramsey interferometry infers on-chip microwave amplitude and frequency from ac Stark shifts of the first two transitions, enabling broadband transfer function characterization.