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Q: Fachverband Quantenoptik und Photonik
Q 50: Ultrakalte Atome (Einzelne Teilchen und Ionenfallen)
Q 50.3: Vortrag
Mittwoch, 21. März 2007, 17:00–17:15, 5D
Sub-micro second, state selective detection of a single 87Rb atom in an optical dipole trap — •Florian Henkel1, Michael Krug1, Fredrik Hocke1, Wenjamin Rosenfeld1, Jürgen Volz1, Markus Weber1, and Harald Weinfurter1,2 — 1Department für Physik der LMU, Schellingstraße 4/III, 80799 München — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching
Fast and efficient, state selective detection of internal atomic states are a vital ingredient towards the realisation of long-distance atom-atom entanglement and for a future loophole-free test of Bell’s inequality [1].
Starting from two highly entangled atom-photon pairs [2] as two space-separated sources for the Bell experiment, ordinary flourescence techniques (typically a few 0.1 ms) prove to be far too slow as an atomic state detection tool. In order to keep the distance between the two local, simultaneous atomic state measurements on a reasonable, experimental level, sub-micro second detection of single 87Rb atoms has to be realised.
Here, we propose to combine an efficient, hyperfine-state selective, laser-induced ionisation process [3] with an already implemented adiabatic population transfer, which should allow us to perform projective atomic spin measurements within some 220 ns.
[1] C. Simon and WTM Irvine, Phys. Rev. Lett. 91, 110405 (2003)
[2] Volz et al., Phys. Rev. Lett. 96, 030404 (2006)
[3] E. S. Fry and T. Walther and S. Li, Phys. Rev. A, 52, (1995)