Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Gases (Fermions) III

Q 48.4: Talk

Wednesday, March 7, 2018, 14:45–15:00, K 1.022

Towards realizing small Fermi-Hubbard type systems atom by atom — •Phillip Wieburg, Martin Schlederer, Thomas Lompe, and Henning Moritz — Institut für Laser-Physik, Universität Hamburg

The development of quantum gas microscopes has enabled the study ultracold atoms in optical lattices with single site, single atom resolution. In these experiments, the gases are typically cooled evaporatively and loaded into a large optical lattice formed by interfering laser beams. Here, we will report on the present status of an experimental setup designed to follow a complementary approach [1] where small Fermi-Hubbard type systems are assembled site by site using optical microtraps.

We have lasercooled K40 atoms to sub-Doppler temperatures using magneto-optical trapping and grey molasses cooling. After magnetic transport to the science region the atoms are loaded into optical lattices for further Raman-sideband cooling. Our setup features two high NA in-vacuo microscopes which will be used to create small scale structures such as 2x2 site plaquettes and to image the atoms. The 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.

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