Diraq, imec Top 99% Two-Qubit Fidelity on 300mm Silicon Wafers
Updated
Updated · The Quantum Insider · Aug 17
Diraq, imec Top 99% Two-Qubit Fidelity on 300mm Silicon Wafers
1 articles · Updated · The Quantum Insider · Aug 17
Summary
Randomly selected devices built on standard 300mm industrial silicon wafers achieved more than 99% two-qubit fidelity, marking a notable manufacturing milestone for silicon spin qubits.
The result matters because silicon quantum hardware can ride existing semiconductor fabs, lithography and process flows, potentially shortening the path from lab prototypes to factory-scale production.
Diraq and imec now place silicon near trapped-ion fidelity benchmarks, while Diraq's separate hot-qubit work reached 98.92% at 1 Kelvin, easing some cooling demands.
Silicon still trails rival platforms on scale: trapped-ion systems report 99.97% to 99.99% two-qubit fidelity, while superconducting and neutral-atom approaches already operate with far larger qubit counts.
The next hurdle is engineering rather than basic physics—maintaining fidelity as qubit numbers and circuit depth rise, and integrating control, readout and yield across full production runs.