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As the field of quantum computing progresses to larger-scale devices,multiplexing will be crucial to scale quantum processors. While multiplexedreadout is common practice for superconducting devices, relatively little workhas been reported about the combination of flux and microwave control lines.Here, we present a method to integrate a microwave line and a flux line into asingle "XYZ line". This combined control line allows us to perform fastsingle-qubit gates as well as to deliver flux signals to the qubits. Themeasured relaxation times of the qubits are comparable to state-of-art devicesemploying separate control lines. We benchmark the fidelity of single-qubitgates with randomized benchmarking, achieving a fidelity above 99.5%, and wedemonstrate that XYZ lines can in principle be used to run parametricentangling gates.

Full control of superconducting qubits with combined on-chip microwave and flux lines