Fast parametrically driven entangling gates in superconducting circuits using a tunable coupler*

A major challenge in realizing scalable quantum computers is the optimization of two-qubit entangling gates. In current superconducting architectures, ZZ crosstalk introduces unwanted entanglement while slow gates push fidelities down due to decoherence. It is thus desirable to make entangling gates as fast as possible while maintaining control over multi-qubit interactions. In this work we demonstrate a tunable coupler that can be flux biased to mitigate ZZ crosstalk while allowing fast parametrically driven two-qubit entangling gates between far-detuned fixed-frequency transmons.