Statistical analysis of randomized benchmarking

Abstract

Randomized benchmarking and variants thereof, which we collectively call RB+, are widely used to characterize the performance of quantum computers because they are simple, scalable, and robust to state-preparation and measurement errors. However, experimental implementations of RB+ allocate resources suboptimally and make ad-hoc assumptions that undermine the reliability of the data analysis. In this paper, we propose a simple modification of RB+ which rigorously eliminates a nuisance parameter and simplifies the experimental design. We then show that, with this modification and specific experimental choices, RB+ efficiently provides estimates of error rates with multiplicative precision. Finally, we provide a simplified rigorous method for obtaining credible regions for parameters of interest and a heuristic approximation for these intervals that performs well in currently relevant regimes.

9 pages, 2 figures

References in corpus (5)

• Randomized Benchmarking of Quantum Gates
• Robust randomized benchmarking of quantum processes
• Direct Fidelity Estimation from Few Pauli Measurements
• Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking
• Accelerated Randomized Benchmarking