Algorithmic Qubits (Error-Corrected Logical Qubits)

Google Quantum AI's metric for measuring progress toward fault-tolerant quantum computing, based on the error suppression factor Lambda achieved by surface code logical qubits. On the Willow processor, a distance-7 surface code using 101 qubits achieved a logical error rate of 0.143% per cycle, with errors suppressed by a factor of 2.14 for each increase in code distance by 2, operating below the surface code threshold.[1]

  • Algorithm: Surface code quantum error correction
  • Category: other
  • Qubits: 101
  • Framework: Cirq, Stim
  • Hardware: Google Willow (superconducting)
  • Reproducible: Yes
  • Published:
  • error-correction
  • Google
  • logical-qubit
  • surface-code
  • Willow

What algorithm does Algorithmic Qubits (Error-Corrected Logical Qubits) use?

Algorithmic Qubits (Error-Corrected Logical Qubits) uses the Surface code quantum error correction algorithm, categorized under other.

Frequently Asked Questions

What is the Algorithmic Qubits (Error-Corrected Logical Qubits) benchmark?

Google Quantum AI's metric for measuring progress toward fault-tolerant quantum computing, based on the error suppression factor Lambda achieved by surface code logical qubits. On the Willow processor, a distance-7 surface code using 101 qubits achieved a logical error rate of 0.143% per cycle, with errors suppressed by a factor of 2.14 for each increase in code distance by 2, operating below the surface code threshold.

Is Algorithmic Qubits (Error-Corrected Logical Qubits) reproducible?

Yes, this benchmark is reproducible.

Sources

  1. "Quantum error correction below the surface code threshold", accessed 2026-03-19 — arXiv
  2. "Quantum error correction below the surface code threshold (Nature)", accessed 2026-03-19 — DOI