Fig. 2: Qubit readout and control.
a Two-tone spectroscopy near zero flux. The fit to the \(\left\vert g\right\rangle\)-\(\left\vert e\right\rangle\) transition (blue line) and \(\left\vert g\right\rangle\)-\(\left\vert f\right\rangle\) transition (orange line) is shown on the right half of the data. b Histogram of single-shot qubit readout. The qubit is populated to both the ground and excited state via a Xπ/2 pulse prior to measurement. We read out the qubit at the resonator frequency corresponding to the qubit being in the \(\left\vert g\right\rangle\) state. c Rabi oscillations of the qubit versus a square pulse with room temperature drive amplitude A and length t. d Pulse sequence for the Rabi experiment shown in (c). e Rabi frequency as a function of A. We extract the Rabi frequencies from (c). The black line is a linear fit of the Rabi frequency versus drive amplitude.
