Solid-state defect qubit for quantum information science : from materials to devices

Since the first experimental realization of quantum algorithms in 1998 using nuclear magnetic resonance (NMR) systems, advancements in quantum hardware have unlocked new opportunities for practical quantum technologies. Among various platforms, defect spin qubits in solid-state systems have emerged as a promising candidate, addressing key challenges such as control fidelity, scalability, and error correction, which previously hindered NMR-based approaches. In this talk, I will introduce the realization and control of spin qubit-based quantum platform, focusing on nitrogen-vacancy (NV) centers in diamond. I will highlight recent progress in diamond-based quantum processing, which leverage hybrid spin networks comprising electronic and nuclear spins. Lastly, I will explore ongoing efforts to better engineer materials and devices, with the goal of advancing toward error suppressed more scalable solid-state qubit platform.