Qubit Zoo

Hardware-efficient quantum error correction via concatenated bosonic qubits

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Experimental concatenation of five stabilized bosonic cat qubits with an outer distance-5 repetition code in a microfabricated superconducting circuit.

Key Results

  • Phase-flip correction improved with repetition-code distance while bosonic stabilization suppressed bit flips
  • Minimum measured logical error per cycle of for the distance-5 code
  • Demonstrated a cat–transmon noise-biased CX gate for syndrome extraction

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