IonQ Hits 99.99% Two-Qubit Fidelity, Claiming Quantum Error-Rate Record
Updated
Updated · The Motley Fool · May 24
IonQ Hits 99.99% Two-Qubit Fidelity, Claiming Quantum Error-Rate Record
3 articles · Updated · The Motley Fool · May 24
IonQ said it achieved 99.99% two-qubit gate fidelity, a record in quantum system performance that sharply reduces one of the field’s biggest barriers: error rates.
That accuracy matters because two-qubit gate fidelity measures how reliably qubits perform calculations, and higher reliability is critical before quantum machines can handle useful real-world workloads.
IonQ, which uses trapped ions as qubits, said the milestone supports its path toward scaling to millions of qubits by 2030, though the company remains a higher-risk, not-yet-operationally profitable pure play.
The result adds to signs that quantum computing may be advancing faster than some earlier skepticism suggested, even as the timeline for broad commercial usefulness remains uncertain.
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IonQ Sets New Quantum Benchmark with 99.99% Two-Qubit Fidelity: Implications for Industry, Competition, and Society
Overview
In October 2025, IonQ, after acquiring Oxford Ionics, set a new benchmark in quantum computing by achieving a record-breaking 99.99% two-qubit gate fidelity using mass-manufacturable technology. This milestone marks a major leap in the accuracy and reliability of quantum operations, meaning only one error occurs in every 10,000 operations. Such high fidelity dramatically reduces error rates, which is crucial for building larger and more practical quantum computers. By reaching this level of precision, IonQ has paved the way for more powerful quantum systems and accelerated the path toward real-world commercial applications.