Stable 3-qubit quantum register created using atomic-scale defects integrated into an optical waveguide, in a silicon photonic chip

https://phys.org/news/2026-01-scientists-qubit-quantum-register-silicon.html

"scalable (uses silicon/ existing fiber optics), up to 100 ms coherence (substantial duration for spin-based qubits)... electrically charged atoms fired into silicon creating initial defect sites, rapid thermal annealing,  lithographic patterning adds optical waveguide/ metal traces for spin control... multi-qubit nodes store/ process information locally before transmitting... generated entanglement/ performed controlled-NOT gates... future: improving readout efficiency/ narrowing optical linewidths, repeaters for quantum data"