Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Information (Quantum Repeater)
Q 47.2: Talk
Wednesday, March 7, 2018, 14:30–14:45, K 1.020
Atom-to-photon quantum-state transfer for quantum networks — •Pascal Eich, Matthias Bock, Stephan Kucera, Andreas Lenhard, Christoph Becher, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, Campus E2.6, 66123 Saarbrücken
Quantum interfaces between atomic nodes and photonic quantum channels are crucial building blocks for single-atom-based quantum networks. In previous work, we demonstrated the quantum-state transfer from a single photon at 854 nm onto the electronic state of a single trapped 40Ca+ ion [1]. Here we demonstrate the inverse mapping, of an atomic quantum state onto the polarization state of a single 854-nm photon. This experiment completes our fully bi-directional atom-photon quantum interface that provides compatibility with low-loss telecom-fiber communication through polarization-preserving quantum frequency conversion (QFC) [2].
[1] S. Kucera et al., DPG-Verhandlungen 2017, Q 2.5
[2] M. Bock et al., arXiv:1710.04866 (2017)