Fig. 2: Single-qubit gate characterization.
From: Universal control of a six-qubit quantum processor in silicon
a, Rabi oscillations for every qubit, taken sequentially. The spin fraction refers to the spin-up fraction for qubits Q2–Q5 and to the spin-down fraction for qubits Q1 and Q6. The drive amplitudes were adjusted in order to obtain uniform Rabi frequencies of 5 MHz. b, Qubit frequency for each of the six qubits. c, Rabi frequency of each qubit as a function of the applied microwave power. d, Randomized benchmarking results for each qubit, using a 5 MHz Rabi frequency. The reported fidelity is the average single-qubit gate fidelity, and the uncertainties (2σ) are calculated using the covariance matrix of the fit. e, Table showing the dephasing time T2*, Hahn echo decay time (T2h) and visibilities (vis.) for each qubit.
