Hamburg 2009 – wissenschaftliches Programm
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SYDI: Symposium Dissertationspreis
SYDI 1: Dissertation Prize Symposium
SYDI 1.3: Hauptvortrag
Dienstag, 3. März 2009, 11:30–12:00, VMP 8 HS
Poking and probing strongly correlated gases in optical lattices — •Simon Fölling1, Artur Widera2, Stefan Trotzky2, Olaf Mandel2, Tatjana Gericke2, Torben Müller2, Fabrice Gerbier2, Patrick Cheinet2, and Immanuel Bloch2 — 1Harvard-MIT Center for Ultracold Atoms and Department of Physics, Harvard University, Cambridge, MA, USA — 2WA QUANTUM, Institut für Physik, Johannes Gutenberg-Uni Mainz, 55099 Mainz
Ultracold quantum gases in optical lattices are powerful model systems for implementing solid state physics models. This is especially true for the strongly correlated domain, which is even hard to access computationally. Several novel methods are demonstrated that probe the special properties of strongly correlated states in lattice potentials.
The normal methods of probing ultracold weakly interacting gases can be hard to use on strongly correlated systems, as they are mostly sensitive only to first-order correlations. On the other hand, the methods from "classical" solid state physics such as conductivity measurements can often not be employed directly to work with ultracold atom clouds.
The methods shown use the special properties of optical lattice systems such as the ability to manipulate the lattice depth and geometry as well as the direct access to particle-particle correlations and internal states of the particles. In this way, the system can be manipulated and probed in the deeply correlated regime to explore the many-body properties of the quantum gas.