Distributed blind quantum computing using a two-node quantum network based on Silicon-vacancy (SiV) centers in nanophotonic cavities*

Quantum networks have the potential to enable secure communications and distributed quantum computing. The key obstacle thus far has been the difficulty in achieving efficient light-matter interfaces while accessing multi-qubit controls. In this talk, I will first talk about our approach to realizing a two-node quantum network based on the silicon-vacancy center (SiV) in diamond in nanophotonic 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, allowing us to generate remote entanglement between two physically separate nodes. This directly enables applications leveraging distributed quantum systems, such as blind quantum computing (BQC). In the second part, I will talk about our recent work in the experimental demonstration of BQC using this two-node quantum network. Specifically, I will report the first experimental implementation of a universal gate set for matter-based BQC, including distributed blind operations, using a two-node SiV-based quantum network.