Experimental Pauli-frame randomization on a superconducting qubit

The promise of quantum computing with imperfect qubits relies on the ability a system to scale cheaply through error correction and fault-tolerance. While fault-tolerance requires relatively mild assumptions about nature qubit errors, overhead associated coherent non-Markovian errors can be orders magnitude larger than purely stochastic Markovian errors. One proposal address this challenge is randomize circuits interest, shaping Pauli but leaving aggregate computation unaffected. randomization technique also suppress couplings slow degrees freedom evolution. Here we demonstrate implementation Pauli-frame in superconducting circuit system, exploiting flexible programming control infrastructure achieve low effort. We use high-accuracy gate-set tomography characterize detail properties error, without procedure, which allows us make rigorous statements Markovianity as well observed that suppresses signatures evolution statistically insignificant levels, from model violation ranging $43\sigma$ $1987\sigma$, down violations between $0.3\sigma$ $2.7\sigma$ under randomization. Moreover, that, randomization, experimental are described by model, similarly (between $0.8\sigma$ $2.7\sigma$). Importantly, all these improvements accuracy were obtained degradation fidelity, some rates quantified diamond norm.