Quantum computing hybrid nuclear-electron spin platform utilizes nuclear spin (intrinsic angular momentum) of Tungsten-183 atoms as qubits

https://phys.org/news/2025-12-solid-state-quantum-processor-based.html

"each nuclei sits close to rare-earth ion Er3+, which carries unpaired electron spin, much easier to manipulate/ detect than nuclear spin, so it acts as amplifier for nuclear spin... atoms located within calcium tungstate crystal, which is placed on top of superconducting microwave resonator used to manipulate quantum states... no need for additional optical transition (as in NV centers) or particular electrical properties (as in semiconductor donors)... very long coherence (seconds)... improves sensitivity/ performance"