IonQ said it has reached a record 99.9% two-qubit gate fidelity on its latest trapped-ion system, a technical benchmark that could help move quantum computers closer to practical error correction.

The company described the result as an important hardware milestone because gate fidelity measures how accurately a quantum system can perform operations on qubits. Higher fidelity reduces errors, which is essential for building larger and more reliable quantum machines.

Quantum computing firms have been racing to improve performance while keeping error rates low enough for real-world use. IonQ’s latest claim adds to that competition, although the path from laboratory benchmark to commercially useful systems remains difficult and will require further progress.

The announcement underscores how the industry is shifting from raw qubit counts toward quality, stability and scalability. For now, the result signals another incremental advance in a field where small gains can have outsized significance.