A trusted node–free eight-user metropolitan quantum communication network

• DOI: 10.1126/sciadv.aba0959
• Publication Date: 2020-09-02T23:15:37Z
• Authors: Siddarth Koduru J...; Djeylan Aktas; Sören Wengerowsky; Martin Lončarić; Sebastian Philipp...; Bo Liu; Thomas Scheidl; Guillermo Currás ...; Željko Samec; Laurent Kling; Alex Qiu; Mohsen Razavi; Mario Stipčević; John G. Rarity; Rupert Ursin
• Keywords: /dk/atira/pure/core/keywords/quantum_information_SRI; Quantum Physics; 9. Industry and infrastructure; /dk/atira/pure/core/keywords/faculty_of_enigneering/photonics_and_quantum; Physics; FOS: Physical sciences; quantum communication ; entanglement ; quantum network ; quantum key distribution ; QKD ; quantum optics; Bristol Quantum Information Institute; 01 natural sciences; Photonics and Quantum; QETLabs; quant-ph; 0103 physical sciences; /dk/atira/pure/core/keywords/qetlabs; Electronics; Quantum Physics (quant-ph); Research Articles

Quantum communication is rapidly gaining popularity due to its high security and technological maturity. However, most implementations are limited just two communicating parties (users). networks aim connect a multitude of users. Here, we present fully connected quantum network on city-wide scale without active switching or trusted nodes. We demonstrate simultaneous secure connections between all 28 pairings eight Our novel topology easily scalable many users, allows traffic management features, minimizes the infrastructure as well user hardware needed.