Quantinuum Says Helios Results Strengthen Its Path to Apollo
Quantinuum reported a logical memory fidelity of 99.9995% on its Helios quantum computer, equivalent to roughly five failures per million cycles. The company said this error-correction result increases its confidence in a 2029 target for Apollo, its planned fault-tolerant system. CEO Rajeeb Hazra described the result as derisking the industry.
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What this could mean
- 0–2 yearsPlausible
Helios could become a near-term testbed for early logical circuits that need hundreds of cycles of coherent memory, letting hardware and algorithm teams benchmark fault-tolerant subroutines before Apollo is available.
At 99.9995% logical memory fidelity, error accumulation over hundreds of cycles stays low enough for multi-step logical operations to remain informative, and Quantinuum's trapped-ion hardware supports circuit execution with high connectivity. This makes pre-Apollo logical benchmarking credible without assuming unproven gate-level fault tolerance.
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