Group Seminar via Zoom:  A triangular-lattice Fermi gas microscope

June 15, 2021

Peter Schauß, University of Virginia
Group Seminar via video conference (Zoom)
Tuesday, June 15th, 3:00pm (MEZ)

Dealing with the unique situation of partial lock downs worldwide and home office solutions at our Institute due to the current spreading of the Covid 19 virus, we are now holding our group seminars and journal clubs via video conference.
This procedure enables us to continue our research, enhance discussions and exchange important information.


Geometrically frustrated many-body systems show many interesting emerging phenomena, ranging from kinetic frustration to exotic spin ordering and chiral spin liquid phases. Ultracold atom systems offer great tunability and flexibility to realize such systems in a wide parameter range of interactions, densities, and spin-imbalance. In this talk, I will present our recent results on site-resolved imaging of ultracold fermionic lithium atoms on a triangular optical lattice. We realized degenerate Fermi gases and successfully loaded them into a two-dimensional triangular optical lattice. To characterize this lattice, we observed Kapitza-Dirac scattering using a molecular Bose-Einstein condensate. Collecting the emitted photons during Raman sideband cooling using a high-resolution microscope objective enabled high-fidelity imaging of individual fermionic atoms in the triangular lattice with single-site resolution. Recently we realized two-dimensional systems and are currently working towards realizing Mott insulators in the triangular lattice. This novel experimental platform will allow us to study spin and density correlations in the triangular Hubbard model, to explore signatures of frustration and spin-hole bound states and might enable a direct observation of chiral correlations.

 If you would like to join our group seminars via Zoom, please contact us for more information.

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