Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Ultra-Cold Atoms, Ions and BEC III (with Q)

A 27.2: Fachvortrag

Donnerstag, 5. März 2009, 14:30–15:00, VMP 6 HS-C

Quantum Gases under Electron Bombardment — •Herwig Ott, Tatjana Gericke, Peter Würtz, Tim Langen, and Andreas Koglbauer — Institut für Physik, Johannes Gutenberg-Universität, Mainz

Scanning electron microscopy is routinely used to study solid objects on a nanometer scale. Applied to ultracold quantum gases it constitutes a powerful imaging and manipulation technique that combines single atom sensitivity with high spatial resolution.

We have adapted a scanning electron microscope for the study of Bose-Einstein condensates of rubidium atoms. The focussed electron beam ionizes the atoms which are subsequently detected. Loading the condensate in a two-dimensional optical lattice with 600 nm period we demonstrate single site addressability and show that one can produce arbitrary patterns of occupied lattice sites. Such micro-engineered quantum gases might become an important resource for future applications in quantum simulation and quantum information processing.

Ultimately, we want to employ this technique to make snapshots of the many-body wave function and to get in situ access to the quantum correlations of bulk, lattice and low-dimensional quantum systems.