Overview
- Helios computes with 98 barium‑ion qubits—up from 56 ytterbium qubits in Quantinuum’s prior H2 system—with ions that can be moved to interact with any other qubit.
- Quantinuum says Helios can form a logical qubit from two physical ions, reflecting the platform’s low native error rates compared with superconducting approaches.
- The company reports 99.921% two‑qubit entanglement fidelity and introduces on‑the‑fly error correction accelerated by Nvidia GPUs.
- Researchers used Helios to run a record quantum simulation of the Fermi–Hubbard model and, in early tests, entangled 94 error‑protected qubits.
- Quantinuum outlines a roadmap that targets a 192‑qubit Sol machine in 2027 and an Apollo system with thousands of qubits in 2029, describing full fault tolerance as the goal.