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Quantum-repeater cell based on free space coupled 40Ca+ ions

Max Bergerhoff, Omar Elshehy, Stephan Kucera, Matthias Kreis, and Jürgen Eschner

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Abstract

We demonstrate the implementation of a quantum repeater cell with photons from two free-space-coupled 40Ca+ ions. We generate asynchronous ion-photon entanglement and transfer it to photon-photon entanglement by a quantum gate and a measurement.

© 2023 The Author(s)

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