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Q: Fachverband Quantenoptik und Photonik
Q 15: Poster: Quantum Optics and Photonics I
Q 15.43: Poster
Montag, 23. März 2015, 17:00–19:00, C/Foyer
One-Dimensional Model for Bose-Einstein Condensate in Gravito-Optical Surface Trap — •Javed Akram1, Benjamin Girodias2, and Axel Pelster3 — 1Department of Physics, Freie Universität Berlin, Germany — 2Pomona College, Claremont, USA — 3Physics Department and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany
We study both static and dynamic properties of a weakly interacting Bose-Einstein condensate in a quasi-one-dimensional gravito-optical trap, where the downward pull of gravity is compensated by the exponentially decaying potential of an evanescent wave. At first we work out approximate solutions to the Gross-Pitaevskii equation for small number of atoms using a variational Gaussian ansatz and for larger number of atoms using the Thomas-Fermi limit. Then we confirm the accuracy of these approximate analytic solutions by comparing them to numerical results. From there, we numerically analyze how the BEC cloud expands ballistically when the confining laser beams are shut off, showing agreement between our theoretical and previous experimental results.