Fig. 2: Single-qubit operation of device A.
From: Industry-compatible silicon spin-qubit unit cells exceeding 99% fidelity
a,b, Rabi chevrons for qubits 1 (a) and 2 (b). Probability of reading out an even or blockaded spin state Peven, when applying microwave signal at the frequency fESR – fLO for a duration of tESR. c,d, Coherent Rabi oscillations at fL,Qi for qubits 1 (c) and 2 (d). Real-time feedback is implemented to counteract the Larmor frequency deviation39. The local oscillator frequency is set to fLO = 18.610 GHz. The microwave power applied to qubit 1 is approximately 7% larger than that to qubit 2 resulting in matching Rabi frequencies of fRabi = 658.6(3) kHz.
