Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.7: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Rydberg Excitation and Many-Body Localization in a Two-Dimensional Quantum Gas — Sebastian Hild1, Johannes Zeiher1, •Antonio Rubio Abadal1, Simon Hollerith1, Jae-Yoon Choi1, Tarik Yefsah1, Immanuel Bloch1,2, and Christian Groß1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, 80799 München, Germany
Ultracold atoms in optical lattices provide an ideal testbed for the study of strongly correlated many-body systems. The detection and manipulation of single atoms in two-dimensional optical lattices offer a versatile toolbox to investigate condensed matter models. In our setup we are capable of such control and local detection at the single-atom level by fluorescence-imaging of a two-dimensional bosonic gas of Rubidium-87. In recent work we have investigated Rydberg gases, which feature strong van der Waals interactions and can be used for the study of strongly correlated long-range many-body systems. This has allowed us to observe crystalline states and to microscopically characterize Rydberg superatoms, as well as to detect spin correlations induced by Rydberg-dressed interactions. We have also explored the localization transition occurring in a disordered interacting bosonic system in two dimensions, in which a for large enough disorder strength non-thermal states prevail. To this end we prepare a highly-excited Mott insulator state and study its thermalization in the presence of a random disorder potential.