Xanadu develops world's first on-chip photonic qubit which enables Gottesman–Kitaev–Preskill states for error correction at room temperature

https://phys.org/news/2025-06-chip-photonic-qubit-enables-gkp.html

"scalable, many photons' superpositions encoding information in error-resistant manner... well-suited for networking across chips using standard fiber connections... photon-number-resolving detectors with >99% detection efficiencies, ultra-low-loss silicon nitride waveguides on 300 mm wafer platforms, optical packaging... enables deterministic operations... loss reduction/ performance improvement across chip fabrication, component design, and detector efficiency"