Procedure for reducing cross-resonance gate errors using pulse-level control
Quantum Science and Technology IOP Publishing 10:1 (2024) 015026
Authors:
David Danin, Felix Tennie
Abstract:
Current implementations of superconducting qubits are often limited by the low fidelities of multi-qubit gates. We present a reproducible and runtime-efficient pulse-level approach for calibrating an improved cross-resonance gate CR(胃) for arbitrary 胃. This CR(胃) gate can be used to produce a wide range of other two-qubit gates via the application of standard single-qubit gates. By performing an interleaved randomised benchmarking sequence, we demonstrate that our approach leads to significantly lower incoherent errors than the circuit-level approach currently used by IBM. Hence, our procedure provides a genuine improvement for applications where noise remains a limiting factor.
