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arXiv · 2506.00194

Demonstration of a reconfigurable quantum network architecture suitable for ground-to-space communication

Stéphane Vinet·Duncan England·Chang-qing Xu·Thomas Jennewein
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Abstract

We experimentally demonstrate a reconfigurable quantum network architecture suitable for integrating satellite links in metropolitan quantum networks. The network architecture is designed such that once a satellite is in range, it is configured in a multipoint-to-point topology where all ground nodes establish entanglement with the satellite receiver using time multiplexing to optimize long-distance transmission. Otherwise, the satellite up-link can be rerouted to the ground nodes to form a pair-wise ground network. Leveraging both the time and frequency correlations of our photon-pair source, we demonstrate an increased coincidence-to-accidental ratio without additional resource overhead in a five-node network. To contextualize these experimental findings, we project their performance in a quantum key distribution scenario and outline a feasible route toward field deployment, using integrated photonics to enable network integration of up to 72 users.

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Stéphane Vinet, Duncan England, Chang-qing Xu, Thomas Jennewein. 2025-05-30. Demonstration of a reconfigurable quantum network architecture suitable for ground-to-space communication. https://doi.org/10.1364/opticaq.571470

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