Dynamical entanglement purification using chains of atoms and optical cavities

Gonta, Denis; van Loock, Peter

doi:10.1103/PhysRevA.84.042303

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Dynamical entanglement purification using chains of atoms and optical cavities

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van Loock, Peter
van Loock Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Gonta, D., & van Loock, P. (2011). Dynamical entanglement purification using chains of atoms and optical cavities. PHYSICAL REVIEW A, 84(4): 042303. doi:10.1103/PhysRevA.84.042303.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-697B-7

Abstract

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 controlled-NOT 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 toward efficient quantum repeaters for long-distance quantum communication.