Dynamic Entanglement Distribution for Multi-User and Multi-Protocol Quantum Networking

Rui Wang; Marcus J. Clark; Obada Alia; Sima Bahrani; Djeylan Aktas; Matej Peranić; Mario Stipčević; Martin Lončarić; John Rarity; Siddarth K. Joshi; Dimitra Simeonidou

arXiv · 2607.15262

Dynamic Entanglement Distribution for Multi-User and Multi-Protocol Quantum Networking

Rui Wang·Marcus J. Clark·Obada Alia·Sima Bahrani·Djeylan Aktas·Matej Peranić·Mario Stipčević·Martin Lončarić·John Rarity·Siddarth K. Joshi·Dimitra Simeonidou

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Abstract

Dynamic entanglement distribution is a key requirement for scalable, multi-user and multi-protocol quantum networks. We demonstrate a metropolitan-scale entanglement-based quantum communication network enabled by a quantum reconfigurable optical add-drop multiplexer (q-ROADM), which dynamically distributes polarisation-entangled photon pairs from a broadband source to six users over deployed campus and metropolitan fibre. The network supports programmable full-mesh, partial-mesh and sliced sub-network configurations, enabling flexible allocation of entanglement resources according to link condition and service requirement. We demonstrate stable six-user full-mesh operation over more than 150 hours, compare full-mesh and time-shared partial-mesh strategies under different source and detector conditions, and realise quantum network slicing with optional/additional interconnection links. We also show that the same infrastructure can support different quantum protocols by showcasing Secure Inaugural Authentication-Transfer (SIAT) combined with Network flooding over multiple paths to improve the security of onboarding a new user. These results demonstrate a q-ROADM-enabled entanglement distribution architecture as a novel route towards reconfigurable, service-oriented quantum networking over optical fibre infrastructure.

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Rui Wang, Marcus J. Clark, Obada Alia, Sima Bahrani, Djeylan Aktas, Matej Peranić, Mario Stipčević, Martin Lončarić, John Rarity, Siddarth K. Joshi, Dimitra Simeonidou. 2026-07-16. Dynamic Entanglement Distribution for Multi-User and Multi-Protocol Quantum Networking. https://arxiv.org/abs/2607.15262

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