Laser annealing for scalable frequency control on multi-qubit quantum processors (Invited Paper)

Scaling quantum processors using superconducting qubits is attractive given their high coherence and ease of fabrication. However, as-fabricated qubit frequency tolerances hover near ~2%, resulting in frequency crowding, thus limiting gate fidelity. We demonstrate LASIQ (laser annealing of stochastically impaired qubits) as a scalable post-fabrication frequency control technique, and its use on Eagle (127Q), Osprey (433Q), and Condor-scale (1121Q) devices. We discuss the limits of tuning precision and scaling implications for multi-qubit quantum processors.