Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 24: Poster II

Q 24.35: Poster

Dienstag, 12. März 2024, 17:00–19:00, KG I Foyer

Towards quantum gas microscopy with dynamically projected optical lattices — •Samuel Jele, Marius Gächter, Giacomo Bisson, Zijie Zhu, Tilman Esslinger, and Konrad Viebahn — Institute for Quantum Electronics, ETH Zurich

In this poster, a novel design for a quantum gas microscope of fermionic potassium (K40) will be presented. In addition to a high-NA objective, the key idea behind achieving single-site resolution makes use of two superimposed accordion lattices with variable and independent lattice constants [1]. By handing over atoms on individual sites from one accordion lattice to the other during lattice expansion, an, in principle, arbitrarily large atom spacing can be achieved, giving access to single-site-resolution with very low imaging duration and lattice depth. Besides single-site resolution, the setup is designed for a repetition rate of 1Hz. For this we implement a parallelisation scheme for laser cooling, evaporative cooling, as well as physics measurements of multiple runs. In addition, a steep magnetic gradient (> 1000G/cm) for rapid evaporative cooling, two separate 3D MOT chambers for potassium and rubidium and fast transport to the glasscell using a moving lattice will help us achieve this goal. The implementation of the accordion lattice using acousto-optic deflectors will allow us to project various lattice structures by simply changing the RF driving signal. This enables us to study more complex systems, such as the Lieb lattices, quasi-periodic structures as well as novel Floquet driving schemes.

[1]: Simon Wili et al., New J. Phys. 25 033037 (2023)

Keywords: Topology; Strongly correlated quantum matter; Synthetic gauge fields; Fermi-Hubbard model