Precision high-speed quantum logic with holes on a natural silicon foundry platform
- Isaac Vorreiter
- Jonathan Y. Huang
- Scott D. Liles
- Joe Hillier
- Ruoyu Li
- Bart Raes
- Stefan Kubicek
- Julien Jussot
- Sofie Beyne
- Clement Godfrin
- Sugandha Sharma
- Danny Wan
- Nard Dumoulin Stuyck
- Will Gilbert
- Chih Hwan Yang
- Andrew S. Dzurak
- Kristiaan De Greve
- Alexander R. Hamilton
2026-08-27
Silicon spin qubits in gate-defined quantum dots leverage established semiconductor infrastructure and offer a scalable path toward transformative quantum technologies. Holes spins in silicon offer compact all-electrical control, whilst retaining the salient features of a quantum dot qubit architecture. However, silicon hole spin qubits are not as advanced as electrons, due to increased susceptibility to disorder and more complex spin physics. Here we demonstrate single-qubit gate fidelities up to 99.8% and a two-qubit gate quality factor of 240, indicating a physical fidelity limit of 99.7%. These results represent the highest performance reported in natural silicon to date, made possible by fast qubit control, exchange pulsing, and industrial-grade fabrication. Notably, we achieve these results in a near-identical device as used for highly reproducible, high-fidelity electron spin qubits. With isotopic purification and further device-level optimisations, silicon hole spin qubits are poised to unlock a new operation regime for quantum CMOS architectures.