Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster III
Q 56.43: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Breakdown of Kohn theorem near Feshbach resonance — •Hamid Al-Jibbouri1 and Axel Pelster2 — 1Fachbereich Physik, Freie Universität Berlin, Germany — 2Fachbereich Physik, Technische Universität Kaiserslautern, Germany
We study the collective excitation modes of a harmonically trapped Bose-Einstein condensate in the vicinity of a Feshbach resonance at zero temperature [1]. To this end we solve the underlying Gross-Pitaevskii equation by using a Gaussian variational approach and obtain the coupled set of ordinary differential equations for the widths and the center of mass of the condensate. A linearization shows that the dipole mode frequency changes when the bias magnetic field approaches the Feshbach resonance.
[1] E. R. F. Ramos, F. E. A. dos Santos, M. A. Caracanhas, and V. S. Bagnato, Phys. Rev. A 85, 033608 (2012)