Qubit Zoo

Fast Logic with Slow Qubits: Microwave-Activated Controlled-Z Gate on Low-Frequency Fluxoniums

1 min read

Demonstrates a microwave-activated CZ gate between low-frequency fluxonium qubits, showing that fluxonium-family devices can support fast entangling logic despite very low qubit transition frequencies.

Key Results

  • CZ gate fidelity about 99.2%
  • Gate duration 61.6 ns
  • Residual ZZ coupling about 46 kHz
  • Establishes two-qubit logic viability for the low-frequency fluxonium family

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