Direct telecom network between atomic and solid-state quantum nodes

• URL: http://arxiv.org/abs/2602.02653v1
• Date: Mon, 02 Feb 2026 19:00:01 GMT
• Title: Direct telecom network between atomic and solid-state quantum nodes
• Authors: Yuzhou Chai, Dahlia Ghoshal, Nayana P. Tiwari, Alexander Kolar, Benjamin Pingault, Hannes Bernien, Tian Zhong,
• Abstract summary: Future quantum networks will interconnect quantum systems with distinct functionalities, ideally over long distances via low-loss telecom optical fibers.<n>Here, we realize a two-node hybrid network that directly connects an atomic single photon source to a solid-state quantum memory in the telecom C-band without the need of frequency conversion and external filtering.
• Score: 34.39269293510889
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Future quantum networks will interconnect quantum systems with distinct functionalities, ideally over long distances via low-loss telecom optical fibers. Here, we realize a two-node hybrid network that directly connects an atomic single photon source to a solid-state quantum memory in the telecom C-band without the need of frequency conversion and external filtering. Both nodes exhibit state-of-the-art performance at 1530 nm: the source achieves a heralded auto-$g^{(2)}(0)$ = 0.031 at a photon rate of 46 kcps, and the memory a storage efficiency of 10.6% with high multimode capacity. We leverage the intrinsic tunability of both nodes to optimize spectral matching, enabling direct networking between the two: single-photon storage and retrieval for 1 $μ$s over up to 37 temporal modes across extended fibers of 10.6 km (metropolitan) and 49.2 km (laboratory) while preserving non-classicality. These results define a high-bandwidth source-memory link that operates natively in the telecom band, introducing a new paradigm for the design and scaling of hybrid quantum networks.

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