Hannover 2010 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 6: Ultra-Cold Atoms, Ions and BEC I (with Q)
A 6.3: Vortrag
Dienstag, 9. März 2010, 14:45–15:00, F 303
Lattice-Ramp Induced Dynamics in an Interacting Bose-Bose Mixture at Zero and Finite Temperature — •Julia Wernsdorfer1, Michiel Snoek2, and Walter Hofstetter1 — 1Institut für Theoretische Physik , Goethe-Universität, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Deutschland — 2Instituut voor Theoretische Fysica, Universiteit van Amsterdam, 1018 XE Amsterdam, Netherlands
In this work we model recent experiments [1] on an interacting 87Rb-41K bosonic gas in an optical lattice at zero and finite temperature. In particular we investigate the dynamics induced by the lattice-ramp up, which is an unavoidable step in the experimental procedure. Using the Gutzwiller mean-field method we examine whether the induced dynamics brings the system out of thermal equilibirum. We explain the experimentally observed oscillations in the visibility by relating them to the issue of adiabaticity [2].
[1] J. Catani, L. De Sarlo, G. Barontini, F. Minardi, and M. Inguscio, Degenerate Bose-Bose mixture in a three-dimensional optical lattice, Phys. Rev. A 77, 011603 (R) (2008)
[2] J. Wernsdorfer, M. Snoek, and W. Hofstetter, Lattice-Ramp Induced Dynamics in an Interacting Bose-Bose Mixture, arXiv:0911.0697v1 (2009)