2019

Statistical analysis of randomized benchmarking

Harper, Robin, Hincks, Ian, Ferrie, Chris et al.

Understand

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.

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