title: Scalable and robust randomized benchmarking of quantum processes.
abstract: In this Letter we propose a fully scalable randomized benchmarking protocol for quantum information processors. We prove that the protocol provides an efficient and reliable estimate of the average error-rate for a set operations (gates) under a very general noise model that allows for both time and gate-dependent errors. In particular we obtain a sequence of fitting models for the observable fidelity decay as a function of a (convergent) perturbative expansion of the gate errors about the mean error. We illustrate the protocol through numerical examples.
authors.affiliation: Institute for Quantum Computing and Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada.
authors.forename: Easwar
authors.initials: E
authors.lastname: Magesan
authors.forename: J M
authors.initials: JM
authors.lastname: Gambetta
authors.forename: Joseph
authors.initials: J
authors.lastname: Emerson