Phys. Rev. Lett. 96, 030404 (2006) [4 pages]Observation of Entanglement of a Single Photon with a Trapped AtomReceived 13 October 2005; published 25 January 2006 We report the observation of entanglement between a single trapped atom and a single photon at a wavelength suitable for low-loss communication over large distances, thereby achieving a crucial step towards long range quantum networks. To verify the entanglement, we introduce a single atom state analysis. This technique is used for full state tomography of the atom-photon qubit pair. The detection efficiency and the entanglement fidelity are high enough to allow in a next step the generation of entangled atoms at large distances, ready for a final loophole-free Bell experiment. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.030404
DOI:
10.1103/PhysRevLett.96.030404
PACS:
03.65.Ud, 03.67.Mn, 32.80.Qk, 42.50.Xa
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