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• 2025-11-20 LQ 0
  IonQ: 0 Logical Qubits — No QEC Demonstration to Date

  As of November 2025, IonQ has not demonstrated any QEC-based logical qubits — a fact the company openly acknowledges on its own official blog. IonQ argues its 99.99% physical qubit fidelity (achieved via Oxford Ionics EQC technology, October 2025) already surpasses the error rates of all existing logical qubit demonstrations, making immediate QEC encoding strategically counterproductive. IonQ targets ~800 fully-featured logical qubits by 2027.