World’s most accurate quantum computer breaks 98-qubit barrier

Quantinuum has unveiled Helios, its most advanced quantum computer to date, featuring 98 fully connected qubits and setting new industry records in accuracy and scalability. Helios nearly doubles the qubit count of its predecessor, H2, and achieves single-qubit gate fidelity of 99.9975% and two-qubit gate fidelity of 99.921%, the highest reported in commercial quantum systems. This performance enables Helios to complete complex quantum computations, such as Random Circuit Sampling benchmarks, with energy efficiency far surpassing classical supercomputers, requiring roughly the power of a single data center rack compared to the astronomical energy classical machines would need. The system introduces a novel ion-trap architecture using barium qubits and visible-light lasers, which reduce costs and improve reliability by enabling atomic-level error detection and correction. Its Quantum Charged Coupled Device (QCCD) layout allows parallel cooling, sorting, and computation, enhancing speed and accuracy. Helios also features a real-time control engine