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Remote Entanglement between a Single Atom and a Bose-Einstein Condensate

M. Lettner, M. Mücke, S. Riedl, C. Vo, C. Hahn, S. Baur, J. Bochmann, S. Ritter, S. Dürr, and G. Rempe
Phys. Rev. Lett. 106, 210503 – Published 26 May 2011
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Abstract

Entanglement between stationary systems at remote locations is a key resource for quantum networks. We report on the experimental generation of remote entanglement between a single atom inside an optical cavity and a Bose-Einstein condensate (BEC). To produce this, a single photon is created in the atom-cavity system, thereby generating atom-photon entanglement. The photon is transported to the BEC and converted into a collective excitation in the BEC, thus establishing matter-matter entanglement. After a variable delay, this entanglement is converted into photon-photon entanglement. The matter-matter entanglement lifetime of 100μs exceeds the photon duration by 2 orders of magnitude. The total fidelity of all concatenated operations is 95%. This hybrid system opens up promising perspectives in the field of quantum information.

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  • Received 21 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.210503

© 2011 American Physical Society

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Published 26 May 2011

A link in a quantum network is built from a hybrid atomic system, connected by fiber optics.

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Authors & Affiliations

M. Lettner, M. Mücke, S. Riedl, C. Vo, C. Hahn, S. Baur, J. Bochmann, S. Ritter, S. Dürr, and G. Rempe

  • Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany

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Issue

Vol. 106, Iss. 21 — 27 May 2011

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