Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

Q 25.58: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Towards a Potassium-39 quantum gas microscope — Scott Hubele, •Yixiao Wang, Martin Schlederer, Alexandra Mozdzen, Guillaume Salomon, and Henning Moritz — Institute for Quantum Physics, University of Hamburg, Germany

The rapid development of quantum simulation has enabled us to study many-body physics with cold atom experiments in a controlled way, avoiding the computational complexity of solving the problems with classical computers. The introduction of quantum gas microscopes further allows to study the system with single-site resolution in real space.

In our experiment, we prepare ultracold Potassium-39 in a 1064nm optical lattice in a bowtie configuration, which can be well described by the Bose-Hubbard model, and confine the atoms in quasi-2D geometry with a pancake-shaped trap and a vertical repulsive lattice. To achieve single-site resolution, we employ Raman sideband imaging at near-zero magnetic field to cool the atoms while simultaneously collecting fluorescence photons with a high-NA objective.

Here, we present the progress towards building a Potassium-39 quantum gas microscope and introduce the experimental techniques for preparing ultracold atoms in the optical lattices and imaging them with high resolution using Raman sideband imaging.

Keywords: Quantum gas microscope; Optical lattice; Bose-Hubbard model; Quantum simulation; Potassium