Canada-Based Xanadu Has Built The World’s First On-Chip Error-Resistant Photonic Qubit (GKP States)— Key For Fault-Tolerant Quantum Computing. Xanadu System, Aurora, With 35 Chips And 13 Km Of Fiber Optics Runs At Room Temp And Scales To Millions Of Qubits. Reducing Optical Loss Is Now Key, As Photon Loss Prevents Reliable Error Correction.