Stuttgart 2012 – wissenschaftliches Programm
Q 34.17: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II
High Resolution Probing and Manipulation of Ultra Cold Quantum Gases — •Felix Stubenrauch, Andreas Vogler, Ralf Labouvie, Peter Würtz, Giovanni Barontini, Vera Guarrera, and Herwig Ott — Fachbereich Physik, Technische Universität Kaiserslautern
The technique of scanning electron microscopy allows for the investigation of solid surfaces and structures with a spatial resolution of a few nanometers. Extending the application of this tool to a cloud of ultracold atoms, we obtain a novel way to image and manipulate the gaseous target, characterized by high spatial resolution and by single atom sensitivity. A focussed electron beam is moved over the cloud and ionizes the atoms by electron impact ionization. The produced ions are subsequently extracted and detected. We successfully employed the technique for in situ observation of temporal correlations in a cold thermal cloud. The electron beam can also be used to locally introduce losses, thus paving the way to investigate dissipative processes in quantum gases and to generate topological defects.