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München 2004 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 11: Fallen und Kühlung

Q 11.3: Vortrag

Montag, 22. März 2004, 17:00–17:15, HS 224

Towards atom-photon entanglement — •Daniel Schlenk1, Markus Weber1, Juergen Volz1, Johannes Vrana1, Christian Kurtsiefer2, and Harald Weinfurter1,31Sektion Physik der LMU Muenchen — 2National University of Singapore — 3Max-Planck Institut fuer Quantenoptik, Garching

Conservation of angular momentum during spontaneous decay of a lambda-type atomic transition generates a spin entangled state between the atom and the emitted photon. A localized single atom in a far-off-resonant dipole trap offers the opportunity to investigate the non-classical correlation properties of such an entangled atom-photon state.

In our experiment we load a single Rb87 atom from a sample of laser cooled atoms into an optical dipole trap. The observed photon anti-bunching in the atomic fluorescence light verifies the presence of single atoms inside our trap. We report on state selective detection measurements of a single Rb atom using a combination of a dark-state-projection and a STIRAP technique. This measurement is the key ingredient in order to analyze the spin correlations and to determine the amount of entanglement in our atom-photon system.

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