Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.3: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG2
Non-equilibrium dynamics of interacting Bosons in an optical lattice — •René Hamburger1, Christian Baals1,2, Bodhaditya Santra1,3, Jian Jiang1, Ralf Labouvie1,2, Andreas Müllers1, and Herwig Ott1 — 1Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany — 3Zentrum für optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
We study the non-equilibrium dynamics of ultracold Bose gases in optical lattices using a scanning electron microscope. In a first experiment we remove the atoms from a slice of a 3D optical lattice and study the subsequent refilling dynamics of different lattice configurations. We observe a transition from a superfluid refilling to the hopping dynamics of a Mott insulator. The latter strongly depends on the filling level of the lattice sites: a n=1 Mott insulator moves in a single-particle hopping process, whereas a n=2 shell can only tunnel via second-order processes. Furthermore, we investigate the dynamics of the center of mass in a three dimensional optical lattice. To this end we shift the position of the confining dipole trap after loading the atoms into the lattice. Finally the atomic cloud is imaged with high resolution using electron microscopy. Upon increasing the lattice depth we find a transition from an oscillating superfluid to a slow uniform movement in the Mott regime. Additionally we present our future project on dissipative generation and stabilization of a dark soliton in 3D.