Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1801.06194 · Nature

An entanglement-based wavelength-multiplexed quantum communication network

Sören Wengerowsky, Siddarth Koduru Joshi, Fabian Steinlechner, Hannes Hübel, Rupert Ursin

Published Dec 1, 2018• 429 citations
arXivHTMLPDF
DOI
10.1038/s41586-018-0766-y

Related papers

Quantum communication with time-bin entanglement over a wavelength-multiplexed fiber network

Jin-Hun Kim, Jin-Woo Chae, Youn-Chang Jeong +1 more

In a quantum network involving multiple communicating parties, an important goal is to establish high-quality pairwise entanglement among the users without introducing multiple entangled-photon sources which would necessarily complicate the overall network setup. Moreover, it is preferable that the pairwise entanglement of photons is in the time-bin degree of freedom as the photonic time-bin qubit is ideally suited for fiber-optic distribution. Here, we report an experimental demonstration of a field-deployable quantum communication network involving multiple users, all of whom share pairwise entanglement in the time-bin degree of freedom of photons. In particular, by utilizing a single spontaneous-parametric down-conversion source which produces a broadband pair of photons and the wavelength-division demultiplexing/multiplexing technology, all the communicating parties within the network are always simultaneously ready for quantum communication. To further demonstrate the practical feasibility of a quantum network with time-bin entanglement over a wavelength-multiplexed fiber network, we demonstrate entangled-photon quantum key distribution with three users, each separated by 60 km of optical fibers.

APL Photonics•Dec 31, 2021•54 citations

A photonic integrated long-distance quantum communication network

Likang Zhang, Jiawei Pan, Teng‐Yun Chen +13 more

Nature Photonics•Jun 19, 2026•2 citations

Fully Connected Entanglement-based Quantum Communication Network without Trusted Node

Xu Liu, Rong Xue, Yidong Huang +1 more

We proposed a fully connected quantum communication network architecture based on multi-user entanglement distribution by space multiplexing and wavelength multiplexing technologies. A fully connected QKD network with 40 users was demonstrated experimentally.

Optical Fiber Communication Conference•Jan 1, 2021•1 citation

Multiplexed entanglement of multi-emitter quantum network nodes

Andrei Ruskuc, C.-J. Wu, E. Green +4 more

arXiv:2402.16224•Nature•Feb 26, 2025•78 citations

Quantum Private Communication System Based on Wavelength-Mode Division Co-Multiplexing

罗均文 Luo Junwen, 李云霞 Li Yunxia, 蒙文 Meng Wen +3 more

Acta Optica Sinica•Jan 1, 2017•2 citations

An Entanglement-Based Wavelength Multiplexed Quantum Communication Network

Sören Wengerowsky, Siddarth Koduru Joshi, Fabian Steinlechner +2 more

Quantum networks scale the advantages of quantum communication protocols to more than just two distant users. Here we present a fully connected quantum network architecture in which a single entangled photon source distributes quantum states to a multitude of users [1]. Our network architecture thus minimizes the resources required of each user without sacrificing security or functionality. As no adaptations of the source are required to add users, the network can readily be scaled to a large number of clients, whereby no trust in the provider of the quantum source is required. Unlike previous attempts at multi-user networks, which have been based on active components, and thus limited to some duty cycle, our implementation is fully passive and thus provides the potential for unprecedented quantum communication speeds. We experimentally demonstrate the feasibility of our approach using a single source of bi-partite polarization entanglement which is multiplexed into 12 wavelength channels to distribute 6 states between 4 users in a fully connected graph using only 1 fiber and polarization analysis module per user.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2019•2 citations
In a quantum network involving multiple communicating parties, an important goal is to establish high-quality pairwise entanglement among the users without introducing multiple entangled-photon sources which would necessarily complicate the overall network setup. Moreover, it is preferable that the pairwise entanglement of photons is in the time-bin degree of freedom as the photonic time-bin qubit is ideally suited for fiber-optic distribution. Here, we report an experimental demonstration of a field-deployable quantum communication network involving multiple users, all of whom share pairwise entanglement in the time-bin degree of freedom of photons. In particular, by utilizing a single spontaneous-parametric down-conversion source which produces a broadband pair of photons and the wavelength-division demultiplexing/multiplexing technology, all the communicating parties within the network are always simultaneously ready for quantum communication. To further demonstrate the practical feasibility of a quantum network with time-bin entanglement over a wavelength-multiplexed fiber network, we demonstrate entangled-photon quantum key distribution with three users, each separated by 60 km of optical fibers.
Quantum networks scale the advantages of quantum communication protocols to more than just two distant users. Here we present a fully connected quantum network architecture in which a single entangled photon source distributes quantum states to a multitude of users [1]. Our network architecture thus minimizes the resources required of each user without sacrificing security or functionality. As no adaptations of the source are required to add users, the network can readily be scaled to a large number of clients, whereby no trust in the provider of the quantum source is required. Unlike previous attempts at multi-user networks, which have been based on active components, and thus limited to some duty cycle, our implementation is fully passive and thus provides the potential for unprecedented quantum communication speeds. We experimentally demonstrate the feasibility of our approach using a single source of bi-partite polarization entanglement which is multiplexed into 12 wavelength channels to distribute 6 states between 4 users in a fully connected graph using only 1 fiber and polarization analysis module per user.