Qubit Zoo

Error per single-qubit gate below 10−4 in a superconducting qubit

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Abstract

                Implementing arbitrary single-qubit gates with near perfect fidelity is among the most fundamental requirements in gate-based quantum information processing.

Key Results

  • In this work, we fabricate a transmon qubit with long coherence times and demonstrate single-qubit gates with the average gate error below 10 −4 , i.e.
  • (7.42 ± 0.04) × 10 −5 by randomized benchmarking (RB).
  • To understand the error sources, we experimentally obtain an error budget, consisting of the decoherence errors lower bounded by (4.62 ± 0.04) × 10 −5 and the leakage rate per gate of (1.16 ± 0.04) × 10 −5 .

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