Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster Session II

A 26.12: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG1

A Homogeneous 2D Fermi Gas — •Niclas Luick, Klaus Hueck, Lennart Sobirey, Jonas Siegl, Thomas Lompe, and Henning Moritz — Institut für Laserphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg

Ultracold 2D Fermi gases in the BEC-BCS crossover provide a model system to investigate e.g. the Kosterlitz-Thouless transition to superfluidity. So far, ultracold 2D Fermi gases have been studied in harmonic trapping potentials. This results in an inhomogeneous density distribution, which complicates the theoretical description of the system and only allows for the extraction of trap averaged quantities when utilizing non-local measurement methods such as time of flight imaging.

Here, we present our realization of an ultracold 2D Fermi gas trapped in a homogeneous disk-shaped potential. The radial confinement is realized by a ring-shaped blue-detuned beam with steep walls. Additionally, a digital micromirror device can be used to remove residual inhomogeneities and to imprint arbitrary repulsive potentials onto the system. Technical details about the generation of optical potentials as well as the current status of our experiment will be presented.