Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster III

Q 56.75: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Counting mesoscopic atom numbers — •Ion Stroescu, Maxime Joos, David B. Hume, Wolfgang Müssel, Helmut Strobel, Jiri Tomkovic, Eike Nicklas, Daniel Linnemann, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Heidelberg, Germany

Many cold atom experiments rely on precise atom number detection. Especially in the context of quantum atom optics experiments that exhibit effects at the quantum level. Here we investigate the limits of atom number counting via resonant fluorescence imaging for mesoscopic samples of trapped atoms. We characterize the precision of these fluorescence measurements beginning from the single atom level up to more than one hundred. Spatial resolution potentially enables the simultaneous detection of atom numbers in two different magnetic sub-states. This capability enables future experiments with highly entangled states of mesoscopic Bose-Einstein condensates going beyond spin squeezed states.