Two-node Remote Quantum Network using Silicon-Vacancy Centers in a Diamond Nanophotonic System (Part 2)

Silicon-vacancy (SiV) centers integrated into diamond nanophotonic crystal cavities provide a high-efficiency spin-photon interface, strong spin-photon interaction, and access to auxiliary memory qubits, which makes them a promising solid-state quantum network platform. In this second part of a two-part talk, we will present on progress towards realizing a quantum link constituted by two SiV-based quantum network nodes spatially separated by 20 meters and connected via optical fiber. Moving from single-node to two-node operation requires suitable emitter entanglement schemes, a robust inter-node experimental setup, and methods for optical frequency matching of two quantum emitters. Extending on the entanglement schemes presented in the first part of this talk, we will be reporting on progress towards efficiently generating Bell pairs of electrons and Si29-nuclei, leveraging integrated error detection. We will be furthermore discussing schemes for entangling multi-dimensional photonic quantum states (photonic qudits) with quantum memories and report on progress towards using these schemes for entanglement distribution between the two quantum network nodes.