Qubit Zoo

Above 99.9% Fidelity Single-Qubit Gates, Two-Qubit Gates, and Readout in a Single Superconducting Quantum Device

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Demonstrates simultaneous high-fidelity operation across the three core functions of a tunable-coupler transmon device rather than optimizing each function in isolation.

Key Results

  • 40-hour-averaged CZ gate fidelity: 99.93%.
  • Simultaneous single-qubit gate fidelities: above 99.98%.
  • Readout fidelities: above 99.94% with a 240 ns readout pulse.
  • Total CZ duration: 33 ns in the reported benchmark.
  • Introduces phased-averaged leakage error amplification (PALEA) for precise calibration of coherent CZ error and leakage.

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