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Procedure for reducing cross-resonance gate errors using pulse-level control
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DOI：10.1088/2058-9565/ad895b.png)
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Abstract
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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(theta) for arbitrary theta . This CR(theta) 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.
Keywords:
quantum computing
customised 2-qubit gates
superconducting qubits
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