Parametric-Resonance Entangling Gates with a Tunable Coupler

High-fidelity parametric gates have been demonstrated with superconducting qubits via rf flux modulation of the qubit frequency. The however leads to renormalization bare qubit-qubit coupling, thereby reducing gate speed. Here, we realize a parametric-resonance gate, which is activated by bringing average frequency modulated in resonance static-frequency while approximately retaining coupling. activation does not depend on modulation, allowing us choose frequencies and avoid collisions. Moreover, show that this approach compatible tunable coupler architectures, reduce always-on residual couplings. Using these techniques, demonstrate iSWAP CZ between two coupled process fidelities as high $99.3\%$ $97.9\%$, respectively. flexibility activating combined architecture provides pathway for building large-scale quantum computers.