Journal
PHYSICAL REVIEW LETTERS
Volume 123, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.210501
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We demonstrate diabatic two-qubit gates with Pauli error rates down to 4.3(2) x 10(-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.
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