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Demonstration of active routing of entanglement in a multi-user network

Autor(en)
I. Herbauts, B. Blauensteiner, A. Poppe, T. Jennewein, Hannes Hübel
Abstrakt

We implement an entanglement distribution network based on wavelength-multiplexing and optical switching for quantum communication applications. Using a high-brightness source based on spontaneous parametric down-conversion in periodically-poled lithium niobate waveguides, we generate polarisation entangled photon pairs with a broad spectrum covering the telecom wavelengths around 1550 nm. The photon pairs have entanglement fidelities up to 99%, and are distributed via passive wavelength multiplexing in a static multi-user network. We furthermore demonstrate a possible network application in a scenario with a single centralised source dynamically allocating two-party entanglement to any pair of users by means of optical switches. The whole system, from the pump laser up to the receivers, is fibre and waveguide based, resulting in maximal stability, minimal losses and the advantage of readily integrable telecom components in the 1550 nm range.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Stockholm University, Austrian Institute of Technology, University of Waterloo (UW), Österreichische Akademie der Wissenschaften (ÖAW)
Journal
Optics Express
Band
21
Seiten
29013-29024
Anzahl der Seiten
12
ISSN
1094-4087
DOI
https://doi.org/10.1364/OE.21.029013
Publikationsdatum
11-2013
Peer-reviewed
Ja
ÖFOS 2012
103026 Quantenoptik, 103025 Quantenmechanik, 103040 Photonik
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/bad5b3d1-641e-42f9-a46f-35bad2c414cc