Quantinuum Helios Color-Code Error Correction (99.9995% logical fidelity per round)

Track; not yet

Why

The measured result is substantive: three code distances show consistent exponential suppression (about 5.5e-4, 3.8e-5, 5e-6 per round; Lambda about 12) on a commercial 98-qubit machine, and an outside Sandia expert called the gains real. But it is a Clifford-only logical-memory demonstration backed by a vendor press release and an unreviewed preprint, based on 3 failures at the top distance, decoded offline for the headline figures, with gates (Lambda 9) and magic states not yet at the target range and rounds taking roughly 200 ms. It is not something a team can adopt; it is a roadmap-credibility signal to monitor for peer review, independent replication, real-time decoding and the Sol (2027) milestone.

Next

Re-check when the preprint (arXiv 2610.24077) is published in a peer-reviewed journal, when real-time end-to-end decoding latency is reported, when below-threshold magic-state or non-Clifford logical gates are shown, and when Quantinuum's Sol system (2027) ships.