Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 7: Ultracold atoms and BEC - II (with Q)

A 7.5: Vortrag

Montag, 6. März 2017, 18:00–18:15, N 1

A Homogeneous 2D Fermi Gas — •Klaus Hueck, Niclas Luick, 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 micro mirror device can be used to remove residual inhomogeneities and to imprint arbitrary repulsive potentials onto the system. This enables us to study systems in close analogy to e.g. gated 2D electron gases.