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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.80: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Dynamical quantum repeater using cavity-QED evolution and coherent light — •Denis Gonta1 and Peter van Loock2 — 1Institut für Optik, Information und Photonik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7, 91058 Erlangen — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz
In the framework of cavity QED, we propose an efficient quantum repeater that uses coherent light and chains of atoms coupled to optical cavities. In contrast to conventional schemes, we completely avoid quantum gates and exploit solely the cavity-QED evolution for entanglement purification and swapping protocols. The entanglement distribution between the repeater nodes is realized with the help of pulses of coherent light. In our previous paper [1], we already proposed a high-fidelity protocol to purify a bipartite entangled state using the evolution of atomic chains coupled to optical cavities. Here, we incorporate this purification protocol into our extended scheme that, together with the entanglement distribution and swapping protocols, yields an efficient and experimentally feasible quantum repeater for long-distance quantum communication.
[1] D. Gonta and P. van Loock, Phys. Rev. A 86, 052312 (2012).