Quantum Gate Fidelity Benchmarked On 52 Qubits Reveals Correlation Errors By Chinese Team

Quantum Gate Fidelity Benchmarked On 52 Qubits Reveals Correlation Errors By Chinese Team

Researchers have demonstrated fidelity benchmarking of up to 52 qubits, achieving 63.09% for a 44-qubit parallel CZ gate and utilising a novel inter-gate correlation metric within a character-average benchmarking protocol to optimise gate performance, increasing a 6-qubit gate’s fidelity from 87.65% to 92.04% and reducing correlation from 3.53% to 3.22%, validating a composite noise model incorporating depolarising and ZZ-coupling effects.