<p>➀ The BMFTR-funded SPINNING project demonstrated a diamond spin-photon quantum computer with 12 qubits, showcasing superior coherence times (over 10 ms) and lower error rates (&lt;0.5%) compared to superconducting IBM models (Eagle, Heron);</p><p>➀ Photonic coupling over 20 meters enabled scalable, distributed quantum registers with high fidelity (over 0.9), offering flexible integration with classical computing systems;</p><p>➂ The project involved collaboration among 28 entities, advancing diamond material processing, qubit fabrication, and AI-driven quantum applications, funded with €16.1 million by the German government.</p>