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Entanglement distribution in optical networks
Ciurana Aguilar, Alex and Martín Ayuso, Vicente and Martinez Mateo, Jesus and Schrenk, Bernhard and Peev, Momtchil and Poppe, Andreas
Entanglement distribution in optical networks.
"IEEE Journal of Selected Topics in Quantum Electronics", v. 21
The ability to generate entangled photon pairs over a broad wavelength range opens the door to the simultaneous distribution of entanglement to multiple users in a network by using centralized sources and flexible wavelength-division multiplexing schemes. Here, we show the design of a metropolitan optical network consisting of tree-type access networks, whereby entangled photon pairs are distributed to any pair of users, independent of their location. The network is constructed employing commercial off-the-shelf components and uses the existing infrastructure, which allows for moderate deployment costs. We further develop a channel plan and a network-architecture design to provide a direct optical path between any pair of users; thus, allowing classical and one-way quantum communication, as well as entanglement distribution. This allows the simultaneous operation of multiple quantum information technologies. Finally, we present a more flexible backbone architecture that pushes away the load limitations of the original network design by extending its reach, number of users and capabilities.
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