Dynamical entanglement purification using chains of atoms and optical cavities

Details Dynamical entanglement purification using chains of atoms and optical cavities Dynamical entanglement purification using chains of atoms and optical cavities

2011-06-17

arxiv.org/abs/1106.3537v2

Phys. Rev. A 84, 042303 (2011)

Physics

Quantum Physics

14 pages, 6 figures, revised version accepted in PRA

Scientific paper

In the framework of cavity QED, we propose a practical scheme to purify dynamically a bipartite entangled state using short chains of atoms coupled to high-finesse optical cavities. In contrast to conventional entanglement purification protocols, we avoid CNOT gates, thus reducing complicated pulse sequences and superfluous qubit operations. Our interaction scheme works in a deterministic way, and together with entanglement distribution and swapping, opens a route towards efficient quantum repeaters for long-distance quantum communication.

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