Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 24: Quantum Gases: Opt. Lattice 1

Q 24.7: Vortrag

Mittwoch, 16. März 2011, 12:00–12:15, HSZ 02

Scanning electron microscopy of ultracold atoms — •Peter Würtz, Andreas Vogler, Arne Ewerbeck, Matthias Scholl, Giovanni Barontini, Vera Guarrera, and Herwig Ott — TU Kaiserslautern

We have adapted a scanning electron microscope for the study of ultracold quantum gases. The technique allows for in situ imaging of single atoms with a resolution of better than 150 nm. Thus, it can readily be applied to study quantum gases in optical lattices. The dissipative interaction of the electron beam with the atoms can be used to selectively remove atoms. In this way, one can create arbitrary patterns of occupied lattice sites. We were able to measure temporal pair correlations in a thermal gas, which demonstrates the single atom sensitivity of our detection method. The system is also an interesting experimental platform to study electron-atom scattering processes and cold ion-atom collisions.