Realization of a multinode quantum network of remote solid-state qubits

Abstract

The distribution of entangled states across the nodes of a future quantum internet will unlock fundamentally new technologies. Here, we report on the realization of a three-node entanglement-based quantum network. We combine remote quantum nodes based on diamond communication qubits into a scalable phase-stabilized architecture, supplemented with a robust memory qubit and local quantum logic. In addition, we achieve real-time communication and feed-forward gate operations across the network. We demonstrate two quantum network protocols without postselection: the distribution of genuine multipartite entangled states across the three nodes and entanglement swapping through an intermediary node. Our work establishes a key platform for exploring, testing, and developing multinode quantum network protocols and a quantum network control stack.

Matteo Pompili

Amazon Postdoctoral Scientist. Experimental Quantum Physicist, Research Software Developer

I am an experimental quantum physicist and a research software developer. My research focuses on quantum networks. I am currently a postdoctoral scientist at the AWS Center for Quantum Networking. During my PhD I built the first multinode quantum network, and demonstrated entanglement delivery using a quantum network stack.