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