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arXiv · 2102.04471

Realization of a multi-node quantum network of remote solid-state qubits

Matteo Pompili·Sophie L. N. Hermans·Simon Baier·Hans K. C. Beukers·Peter C. Humphreys·Raymond N. Schouten·Raymond F. L. Vermeulen·Marijn J. Tiggelman·Laura dos Santos Martins·Bas Dirkse·Stephanie Wehner·Ronald Hanson
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Abstract

The distribution of entangled states across the nodes of a future quantum internet will unlock fundamentally new technologies. Here we report on the experimental 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 capitalize on the novel capabilities of this network to realize two canonical protocols without post-selection: 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 multi-node quantum network protocols and a quantum network control stack.

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Matteo Pompili, Sophie L. N. Hermans, Simon Baier, Hans K. C. Beukers, Peter C. Humphreys, Raymond N. Schouten, Raymond F. L. Vermeulen, Marijn J. Tiggelman, Laura dos Santos Martins, Bas Dirkse, Stephanie Wehner, Ronald Hanson. 2021-02-08. Realization of a multi-node quantum network of remote solid-state qubits. https://doi.org/10.1126/science.abg1919

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