Qubit Zoo

Logical multi-qubit entanglement with dual-rail superconducting qubits

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Four coupled-transmon dual-rail erasure qubits integrated in a superconducting processor, extending the platform from protected single-qubit operation to universal logical control and multi-qubit entanglement.

Key Results

  • Logical Bell-state fidelity: 98.8%
  • Logical CNOT process fidelity: 98.1% at a 13% erasure rate
  • Three-logical-qubit GHZ-state fidelity: 93.9%
  • Archival Nature Physics values supersede the earlier preprint values

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