Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 40: Poster: Ultra-cold atoms, ions and BEC
A 40.21: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.V
Towards probing of fermionic quantum many body systems on the single atom level — •Martin Boll1, Ahmed Omran1, Thomas Gantner1, Timon Hilker1, Michael Lohse1, Seth Coleman1, Immanuel Bloch1,2, and Christian Groß1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str.1, 85748 Garching — 2Ludwig-Maximilians-Universität München, Fakultät für Physik, Schellingstraße 4, 80799 München
Ultracold atoms in optical lattices have proven to be a powerful tool for investigating quantum many body systems. Recent experiments have demonstrated the power of single-site resolved detection in optical lattices for the study of strongly correlated bosonic many body systems. In our new experiment we plan to apply similar techniques to fermionic systems. We will use mixtures of Li-6 and Li-7 atoms to achieve a degenerate bosonic or fermionic many body system trapped in a 3D optical lattice. With a high resolution imaging system, we will be able to resolve single sites in a 2D plane of the lattice and image single atoms. Superimposing an additional small-scale pinning lattice onto the larger-scale physics lattice in order to freeze out the distribution of atoms during imaging, we separate the detector from the physical system under study. This will allow for the investigation of different lattice geometries with in-situ detection of the atoms and precise measurement of the momentum distribution. As a first application we plan to study the quantum phases of the Fermi-Hubbard Hamiltonian locally, and investigate the underlying phenomena associated with condensed matter systems, e.g. quantum magnetism.