Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 19: Quantum Gases: Fermions III

Q 19.4: Talk

Tuesday, March 24, 2015, 11:45–12:00, K/HS2

Local Probing of a Fermionic Mott Insulator — Marco Koschorreck, •Luke Miller, Eugenio Cocchi, Jan Drewes, Daniel Pertot, Ferdinand Brennecke, and Michael Köhl — Rheinische Friedrich-Wilhelms-Universität Bonn

Systems of interacting Fermions are ubiquitous in nature. They exhibit fascinating phenomena like superconductivity, quantum magnetism, and the superfluidity of 3He. Ultracold atomic Fermi gases allow for a particularly clean experimental realization of these quantum many-body systems and for addressing long-standing open questions.

In this talk, we focus on situations in which the motion of particles is confined to two-dimensional layers. In particular, we will report on the realization of the two dimensional Fermi-Hubbard model with repulsive interactions by loading degenerate Fermi gases of Potassium 40 atoms into a three dimensional optical lattice. Exploiting high-resolution imaging combined with radio-frequency spectroscopy enables us to go beyond the standard of global measurements. We observe the formation of Mott insulating domains by in-situ imaging a single two-dimensional layer. Having access to local properties we can identify different quantum phases.