Diabatic Gates for Frequency-Tunable Superconducting Qubits

R. Barends, Chris Quintana, A. G. Petukhov, Yu Chen, Dvir Kafri, Kostyantyn Kechedzhi, Roberto Collins, Ofer Naaman, Sergio Boixo, Frank Arute

Abstract

We demonstrate diabatic two-qubit gates with Pauli error rates down to $4.3(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ in as fast as 18 ns using frequency-tunable superconducting qubits. This is achieved by synchronizing the entangling parameters with minima in the leakage channel. The synchronization shows a landscape in gate parameter space that agrees with model predictions and facilitates robust tune-up. We test both iswap-like and cphase gates with cross-entropy benchmarking. The presented approach can be extended to multibody operations as well.

Locations

• Physical Review Letters - View
• arXiv (Cornell University) - View - PDF
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