Illustration of the CAB procedure for assessing the fidelity of an n-qubit gate, U.

Calibrating quantum gates up to 52 qubits in a superconducting processor

Researchers successfully benchmarked quantum gates up to 52 qubits using a character-average benchmarking protocol, achieving a 63.09% ± 0.23% fidelity for a 44-qubit parallel CZ gate while demonstrating that optimizing global gate fidelity, rather than individual gate fidelities, yields superior performance by accounting for inter-gate correlations.