Silicon atom processor with >99% record-breaking two-qubit gate fidelity organizes 11 qubits into multi-nuclear spin registers

https://phys.org/news/2025-12-silicon-atom-processor-links-qubits.html

"Silicon Quantum Computing's 14|15 platform scales quantum capacity without fidelity loss... precision-placed (1 with 4 phosphorus atoms, 1 with 5, linked by electron exchange) within purified silicon-28... allows for non-local entanglement across different registers, with entanglement preserved for up to 8 nuclear spins... more compatible with existing manufacturing techniques than competing superconducting/ ion-trap designs... future: optimizing control pulses, further increasing qubit quantity"