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3

Higher distances provide better error protection

1

Number of twist-defect pairs to encode logical qubits

QEC Test Requirements:

  • Code distance should be at least 3, preferably 5 or 7 for fault tolerance
  • At least 4 syndrome rounds are recommended to catch time-like error chains
  • Real-time decoding with feed-forward correction is essential for true fault tolerance
  • Noise characterization improves decoder performance significantly
  • Circuit optimization reduces idle errors and crosstalk