Quantum benchmarking of high-fidelity noise-biased operations on a detuned Kerr-cat qubit

Directly benchmarks a complete control toolbox for a detuned Kerr-cat qubit in a planar circuit.

Key Results

SPAM-free fidelities of 99.18(7)% for Z(pi/2) and 92.5(2)% for X(pi/2)
Detuned coherent-state lifetime of 1.2 ms and phase-flip time of 4 microseconds
Dihedral randomized benchmarking finds operational noise bias above 100 and up to about 250