Journal
SCIENCE
Volume 372, Issue 6539, Pages 259-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abg1919
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Funding
- EU Flagship on Quantum Technologies through the project Quantum Internet Alliance (EU Horizon 2020) [820445]
- Netherlands Organisation for Scientific Research (NWO) through a VICI grant [680-47-624]
- Zwaartekracht program Quantum Software Consortium [024.003.037/3368]
- European Research Council (ERC)
- European Union [772627]
- Marie Sklodowska-Curie Actions -Nanoscale solid-state spin systems in emerging quantum technologies -Spin-NANO [676108]
- Erwin-Schrodinger fellowship of the Austrian National Science Foundation (FWF) [J 4229-N27]
- European Research Council (ERC) [772627] Funding Source: European Research Council (ERC)
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The research reports the realization of a three-node entanglement-based quantum network, demonstrating the distribution of genuine multipartite entangled states and entanglement swapping. This work establishes a key platform for exploring, testing, and developing multinode quantum network protocols.
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.
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