Distributed blind quantum computing with Silicon-vacancy (SiV) centers-based quantum networks

Quantum networks promise secure communications and distributed quantum computing, thereby opening up applications such as blind quantum computing (BQC). The key obstacle thus far has been the realization of an efficient light-matter interface for quantum information exchange between servers and clients, while accessing multiple-qubit control for quantum logics. I will first talk about our approach to realizing an universal BQC based on the silicon-vacancy center (SiV) in nanophotonic diamond cavities. Each node contains an electronic spin communication qubit and a nuclear spin memory qubit, while cavity-enhanced interactions enable heralded entangling gates between the spin qubits and time-bin photons, thereby allowing the entanglement generation between two physically separated spins. This enables us to realize an universal blind quantum logic gate set, leveraging computational resources at physically separated servers. I will also talk about our recent work on extending the current quantum network to 3-node quantum network, using C13-based robust quantum memories.