We present a realization of quantum network node, based on a register of trapped ions interfaced with photons via an optical cavity. The node’s operation as a quantum repeater over 50 km channel is demonstrated. Full-text article not available; see video presentation

Quantum 2.0 Conference and ExhibitionJan 1, 20240 citations

Quantum repeater node with free-space coupled trapped ions

Max Bergerhoff, Omar Elshehy, Stephan Kucera +2 more

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arXiv:1508.05272 · Applied Physics B

A quantum repeater node with trapped ions: a realistic case example

A. D. Pfister, M. Salz, M. Hettrich, U. G. Poschinger, F. Schmidt-Kaler

Published Apr 1, 2016• 20 citations

arXiv HTML PDF

DOI: 10.1007/s00340-016-6362-7

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81.6^{+1.9}_{-1.4}\%

. These results demonstrate that trapped-ion repeater-node technology can operate over existing city-scale fiber infrastructure and represent a step toward distributed quantum repeater networks.

Quantum repeater cells are crucial for overcoming loss in long-distance quantum networks. Here, the authors present a trapped-ion implementation of a quantum repeater cell, using two

{}^{40}

{}^{+}

ions that act as quantum memories and are coupled to free-space photonic channels. With this setup they are able to demonstrate asynchronous generation of atom-photon and photon-photon entanglement.