What is the purpose of randomized compiling?

Question: What is the central objective of randomized compiling in the presence of coherent control errors? A) To estimate the complete coherent-error generator before each circuit execution B) To eliminate all physical errors through randomly selected inverse gates C) To tailor coherent noise into an effectively stochastic Pauli-noise model while preserving the intended logical circuit on average D) To convert every non-Clifford gate into a probabilistic mixture of Clifford gates Correct: C Explanation: Randomized compiling inserts random gates together with compensating corrections so that the intended computation is preserved. Averaging over randomized instances transforms coherent error accumulation into a more stochastic effective noise process, which is generally easier to characterize and less damaging in the worst case. Topic: advanced quantum computing / randomized compiling / noise tailoring