Demonstration of two-qubit gates under different bias conditions

One common approach to realize fast two-qubit gates in superconducting qubits is using baseband flux pulses to tune the two qubit states in resonance with each other. High-fidelity two-qubit gates in flux-tunable superconducting qubits have been demonstrated with a variety of flux pulse envelopes, including unipolar, bipolar, and parametric modulation. Each envelope has its own advantage under specific bias settings of the modulated qubit, allowing to refocus the system or remove the need for long-time corrections. Here we present our work on achieving high-fidelity randomized benchmarked two-qubit gate under different idling conditions of the qubit bias.