Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics V

Q 62.1: Poster

Thursday, March 8, 2018, 16:15–18:15, Redoutensaal

Creating Homogeneous Two-Dimensional Fermi Gases — •Fynn Förger, Lennart Sobirey, Niclas Luick, Klaus Hueck, Jonas Siegl, Thomas Lompe, and Henning Moritz — Institut fuer Laserphysik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

In this poster we present the creation and investigation of homogeneous two-dimensional Fermi gases. These gases are well suited to study the intriguing interplay of reduced dimensionality and strong interactions.

To create a two-dimensional system we load our atoms into a strong confining 1D optical lattice. This freezes out any motional degrees of freedom in the third direction. To load 2D Fermi gases both in single and double layer configuration, we developed a method to detect the occupation of the different layers in a single shot measurement.

Homogeneity is achieved by confining the atoms in a box potential in the remaining two directions, which is formed by a repulsive ring-shaped potential created with an optical setup employing three axicons.

We demonstrate how the in plane momentum distributions can be obtained using matter wave focusing and how spin removal can mitigate interaction effects during time of flight. Finally, we report on a novel method to calibrate high intensity absorption imaging to high precision using relative measurements of the momentum transferred to the atoms by the imaging light.