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Q: Fachverband Quantenoptik und Photonik
Q 72: Ultra-cold Atoms, Ions and BEC V (joint session A/Q)
Q 72.3: Vortrag
Freitag, 14. März 2025, 11:30–11:45, GrHS Mathe
Raman sideband imaging of potassium-39 in an optical lattice — •Scott Hubele1,2, Yixiao Wang1,2, Martin Schlederer1,2, Guillaume Salomon1,2, and Henning Moritz1,2 — 1Institute for Quantum Physics, University of Hamburg, Hamburg, Germany — 2Hamburg Centre for Ultrafast Imaging, University of Hamburg, Hamburg, Germany
Understanding many-body quantum systems, both in and out of equilibrium, is often computationally challenging due to the large Hilbert space of the systems of interest. This makes quantum simulation very attractive, especially when the relevant observables and their correlations can be measured directly. The Bose-Hubbard model for instance, which describes interacting bosons in lattices, can be well simulated using ultracold atoms loaded into optical lattices. High-resolution imaging can then be used to resolve the occupation of each lattice site, in what is known as a quantum gas miscroscope. Here, we present our progress towards building a quantum gas microscope using ultracold potassium-39, to study the Bose-Hubbard model in 2D. We generate a 2D square lattice with a single 1064nm beam in a bowtie geometry and additionally confine the atoms along the vertical direction using a shallow-angle vertical lattice. To readout the system state following some time evolution of the system, we employ Raman sideband cooling at near-zero magnetic field to collect fluorescence on the D1 line. Characterization of our imaging scheme and progress towards single-site resolution is presented.
Keywords: Optical lattice; Quantum gas microscope; Bose-Hubbard model