Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster 2: Intersectional Session

Q 23.16: Poster

Dienstag, 15. März 2011, 18:00–21:00, P1

Efficient entanglement purification protocol using chains of atoms and optical cavities — •Denis Gonta and Peter van Loock — Optical Quantum Information Theory Group, Max Planck Institute for the Science of Light, Günther-Scharowsky-Str. 1, Bau 26, D-91058 Erlangen

In the framework of cavity QED, we propose an efficient scheme to purify bipartite entanglement by using short chains of atoms coupled to high-finesse optical cavities. In contrast to the conventional entanglement purification scheme [1], we avoid CNOT gates and reduce, therefore, complicated pulse sequences and superfluous qubit operations. Our interaction scheme works in a deterministic way, and together with entanglement distribution and swapping, yields an efficient quantum repeater protocol for long-distance quantum communication.

[1] C. H. Bennett et al., Phys. Rev. Lett. 76, 722 (1996);

  C. H. Bennett et al., Phys. Rev. A 54, 3824 (1996).