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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster: Quantum Optics and Photonics I

Q 25.29: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Atrium Informatik

Towards a lithium quantum gas microscope for small quantum systems — •Michael Hagemann, Andreas Kerkmann, Mathis Fischer, Benno Rem, Klaus Sengstock, and Christof Weitenberg — Institute for Laser Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

We are setting up a new quantum gas microscope for the preparation and detection of degenerate samples of ⁶Li / ⁷Li atoms to study strong correlations in small quantum systems. The setup consists of a compact 2D- / 3D-MOT chamber without further transport optimized for short cycle times.

We report on the realization of a molecular BEC of fermionic ⁶Li atoms using an all-optical cooling procedure including lambda enhanced gray molasses and evaporation in a crossed optical dipole trap. We show that we can drive a well-controlled intensity ramp for the evaporation with an extinction ratio in laser power of more than three orders of magnitude by using a wave plate in a motorized rotating mount alone, thereby avoiding the thermal effects in acousto-optical modulators.

In addition, we will show the progress of the installation of the high-resolution microscope objective and the loading of the BEC into a 2D triangular lattice and a 1D accordion lattice.