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Title: An atom and a photon
Authors: Volz, J.
Weber, M.
Schlenk, D.
Rosenfeld, W.
Kurtsiefer, C. 
Weinfurter, H.
Issue Date: Jul-2007
Citation: Volz, J., Weber, M., Schlenk, D., Rosenfeld, W., Kurtsiefer, C., Weinfurter, H. (2007-07). An atom and a photon. Laser Physics 17 (7) : 1007-1016. ScholarBank@NUS Repository.
Abstract: The coherent control of single-photon emitters as, e.g., single ions or atoms, is a crucial element for mapping quantum information between light and matter. The possibility of generating entanglement between a photon and the emitter system provides an interface between matter-based quantum memories and photonic quantum communication channels, which is the essential resource for quantum repeaters and other future quantum information applications. To generate entangled atom-photon states, in our experiment, we store a single 87Rb atom in an optical dipole trap. The single-atom/single-photon character is confirmed by the observation of photon antibunching in the detected fluorescence light. The spectral properties of single photons emitted by the atom allowed us to determine the mean kinetic energy of the atom corresponding to 105 μK. We describe a single-atom state analysis method which allowed us to characterize the entanglement between the atom and a single photon emitted in the spontaneous decay. We obtain an entanglement fidelity of 89% that clearly shows the high degree of entanglement in our system and potential for further applications in quantum communication. © 2007 MAIK "Nauka/ Interperiodica".
Source Title: Laser Physics
ISSN: 1054660X
DOI: 10.1134/S1054660X0707016X
Appears in Collections:Staff Publications

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