Automatic single qubit characterization with QubiC*

Initial setup a physical qubit is a complex procedure which involve multiple instruments and multiple experiments and optimization. After the initial setup, they still need to be carefully calibrated routinely because the qubit is sensitive to the environment and the qubit itself can have slow drift so as to impact the gate fidelity.
The Qubit Control system (QubiC) combines the high-speed pulse generation, data acquisition, parallel processing, and deterministic high-throughput data exchange together through the FPGA. Based on this feature, we propose a single qubit characterization and gate optimization protocol which automatically find and tune the qubit. The automatic calibration executes a full suite of serialized and recursive tasks from initial device bring-up to qubit setup to gate optimization in few hours.