SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Poster II

Q 22.11: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

Constructing a matter-wave microscope for lithium atoms featuring a highly tunable optical lattice — •Mathis Fischer, Nora Bidzinski, Justus Brüggenjürgen, Luca Asteria, Henrik Zahn, Marcel Kosch, Klaus Sengstock, and Christof Weitenberg — Institut für Laserphysik, Universität Hamburg, Germany

Imaging is crucial for gaining insight into physical systems. In the case of ultracold atoms in optical lattices, quantum gas microscopes have revolutionized the access to quantum many-body systems by detecting single particles. However they are limited to investigating 2D systems and are technically demanding. We have developed the novel technique of matter-wave microscopy that allows for a magnification of an atomic sample that can then be imaged using standard absorption imaging techniques. This enables sub-lattice resolution of single lattice-sites and imaging of coherence properties in 3D systems even with rather low-resolution imaging setups. In addition, we have introduced a novel lattice setup with a highly stable and dynamically controllable lattice geometry. The interference of three laser beams is suppressed by detuning their frequencies and then pairwisely reestablished by imprinting sidebands onto each beam. This setup allows us to use the same beams as a dipole trap, which we can employ as a confining potential during matter-wave optics and for creating BECs. We are currently upgrading our lithium machine to combine these developments with the precise control over the interaction strength using Feshbach resonances. In the future, we plan to implement single particle sensitive imaging to study intriguing many-body systems.