Entangling single atoms over 33 km telecom fibre

Heralded entanglement between distant quantum memories is the key resource for quantum networks. Based on quantum repeater protocols, these networks will facilitate efficient large-scale quantum communication and distributed quantum computing. However, despite vast efforts, long-distance fibre based...

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Bibliographic Details
Published in:arXiv.org 2021-11
Main Authors: Tim van Leent, Bock, Matthias, Fertig, Florian, Garthoff, Robert, Eppelt, Sebastian, Zhou, Yiru, Malik, Pooja, Seubert, Matthias, Bauer, Tobias, Rosenfeld, Wenjamin, Zhang, Wei, Becher, Christoph, Weinfurter, Harald
Format: Article
Language:English
Subjects:
Attenuation
Links
Optical fibers
Quantum computing
Quantum entanglement
Rubidium
Telecommunications
Online Access:Get full text
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Summary:Heralded entanglement between distant quantum memories is the key resource for quantum networks. Based on quantum repeater protocols, these networks will facilitate efficient large-scale quantum communication and distributed quantum computing. However, despite vast efforts, long-distance fibre based network links have not been realized yet. Here we present results demonstrating heralded entanglement between two independent, remote single-atom quantum memories generated over fibre links with a total length up to 33 km. To overcome the attenuation losses in the long optical fibres of photons initially emitted by the Rubidium quantum memories, we employ polarization-preserving quantum frequency conversion to the low loss telecom band. The presented work represents a milestone towards the realization of efficient quantum network links.
ISSN:2331-8422
DOI:10.48550/arxiv.2111.15526