Quantum networks provide a potential path to realize large-scale quantum computations and simulations. By connecting many small qubit registers through optical links, it becomes possible to create complex quantum systems and distribute computations over the network [1].
In this talk, I will present our latest progress towards realizing such networks with spin qubits associated to color centers in diamond and silicon-carbide. I will introduce how we can create high-fidelity multi-qubit nodes consisting of individually controlled electron- and nuclear spins [2, 3] and how we can connect these nodes through entanglement by photonic links [4]. Then, I will discuss our recent demonstration of a robust quantum memory based on atomic-clock-like states that can store quantum states while entanglement is repeatedly and deterministically distributed between the nodes, a key requirement for creating larger networks. Finally, I will discuss color centers in silicon-carbide as a potential next generation qubit for quantum networks based on integrated devices.
[1] de Bone et al., AVS Quantum Sci. 6, 033801 (2024)
[2] Abobeih et al., Nature 606, 884 (2022)
[3] Bartling et al., Phys. Rev. Applied 23, 034052 (2025) [4] Hensen et al., Nature 526, 682 (2015)