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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics V

Q 62.6: Poster

Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal

An experiment for the study of small Hubbard models with rapid repetition rate — •Martin Schlederer, Phillip Wieburg, Alexandra Mozdzen, Thomas Lompe, and Henning Moritz — Institut für Laserphysik, Universität Hamburg, Hamburg, Deutschland

Investigating the Fermi-Hubbard model with cold atoms is typically done by evaporatively cooling an ultracold Fermi gas and loading it into a large optical lattice. In contrast, we plan to assemble small Fermi-Hubbard type systems site by site using optical microtraps. Each microtrap will contain a single atom cooled to the vibrational ground state by Raman-sideband cooling [1]. This technique combines fast experimental cycle times with single site addressability and detection and will allow to study the fundamental processes governing the Fermi-Hubbard model in a bottom-up approach.

The poster will present the current status of the experiment: We trap 40K atoms in a magneto-optical trap and cool them to sub-Doppler temperatures using a gray molasses . After magnetic transport to the science region they are loaded in optical lattices where in the next step Raman sideband cooling will be investigated. In order to load the atoms into flexible configurations of microtraps and to manipulate them individually, we will use two high resolution microscopes objectives located inside the vacuum chamber.

[1] A.M. Kaufman et al., Physical Review X 2, 041014 (2012).