Fast, robust two-qubit gate operation with low susceptibility to crosstalk are the key to scalable quantum-information processing. A parametrically driven gate is inherently insensitive to crosstalk, while superadiabatic control can speed up the gate without losing accuracy. We propose and experimentally implement superadiabatic two-qubit gates using parametric modulation on superconducting quantum circuits. Our results demonstrate the preservation of adiabaticity at a gate speed close to the quantum limit, in addition to robustness against control instability. We demonstrate a controlled-$Z$ gate with an error rate of $5.8\mathrm{\%}$, mainly limited by qubit decoherence, promising future improvement and scalable implementation.

• Received 6 June 2019
• Revised 11 May 2020
• Accepted 13 May 2020

DOI:https://doi.org/10.1103/PhysRevApplied.13.064012