Demonstration of quantum network protocols over a 14-km urban fiber link
Abstract We report on the implementation of quantum entanglement distribution and quantum state teleportation over a 14.4 km urban dark-fiber link, which is partially underground, partially overhead, and patched in several stations. We characterize the link for its use as a quantum channel and realize its active polarization stabilization. Using a type-II cavity-enhanced SPDC photon pair source, a 40 Ca + single-ion quantum memory, and quantum frequency conversion to the telecom C-band, we demonstrate photon-photon entanglement, ion-photon entanglement, and teleportation of a qubit state from the ion onto a remote telecom photon, all realized over the urban fiber link.
Authors
- Tobias Bauer (ORCID: https://orcid.org/0000-0003-4802-4215)
- Ross Boland
- Elena Arenskötter (ORCID: https://orcid.org/0000-0002-4121-2793)
- Maurice Lessing
- J. Eschner (ORCID: https://orcid.org/0000-0002-8393-7258)
- Ronald Holzwarth (ORCID: https://orcid.org/0000-0002-1589-8496)
- Stephan Kucera
- Christian Haen
- Jonas Meiers
- Christoph Becher (ORCID: https://orcid.org/0000-0003-4645-6882)
- Milad Yahyapour (ORCID: https://orcid.org/0000-0001-7213-3724)
- Marlon Schäfer
Institutions
- Luxembourg Institute of Science and Technology (LU)
- Menlo Systems (Germany) (DE)
- Saarland University (DE)
Publication Details
- Journal
- npj Quantum Information
- Published
- 2024-09-14
- DOI
- https://doi.org/10.1038/s41534-024-00886-x
- Citations
- 22
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 7.64
Funders
- Bundesministerium für Bildung und Forschung