Efficient Unitarity Randomized Benchmarking of Few-qubit Clifford Gates

Understand

Unitarity randomized benchmarking (URB) is an experimental procedure for estimating the coherence of implemented quantum gates independently of state preparation and measurement errors.

• These estimates of the coherence are measured by the unitarity.
• A central problem in this experiment is relating the number of data points to rigorous confidence intervals.
• In this work we provide a bound on the required number of data points for Clifford URB as a function of confidence and experimental parameters.