Quantum

Quantinuum Reports a 10x Reduction in Logical Error Rate on Helios

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 19/10/2026, 14:04:25 UTC.

Briefings

Quantinuum achieved a 99.9995% logical fidelity on its Helios quantum computer using a color code, representing a tenfold reduction in logical errors compared to its previous record. This result, published in October 2026, demonstrates that the company's trapped-ion architecture and flexible error-correction framework can deliver fault-tolerant performance with significantly fewer physical qubits than other modalities. The study showed that logical errors decreased exponentially as code distance increased, with each tested increase reducing remaining errors by a factor of 12. The achievement validates the company's path to Apollo, its planned universal fault-tolerant quantum computer expected by 2029.

Key points

• Quantinuum achieved a 99.9995% logical fidelity on its Helios quantum computer using a color code, representing a tenfold reduction in logical errors compared to its previous record.
• Logical errors decreased exponentially as code distance increased, with each tested increase reducing remaining errors by a factor of 12 on the same Helios hardware.

Context

Quantinuum reported this breakthrough in October 2026, marking its second major error-correction improvement in two months. The achievement validates the company's error-correction leadership and positions it within the target range for Apollo, the planned universal fault-tolerant quantum computer expected by 2029. The study utilized the company's end-to-end framework integrating tailored AI decoders, all-to-all qubit connectivity, and hardware-level error correction.

Limitations

Evidence is limited to a single study on the Helios commercial computer using the color code, which achieved lower logical error rates than the Helix code on the same hardware. The report does not include data from other hardware modalities or specific operational timelines beyond the September 2026 Helix demonstration.

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