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Q: Fachverband Quantenoptik und Photonik

Q 10: Quantum Gases: Bosons 2

Q 10.5: Talk

Monday, March 14, 2011, 15:30–15:45, HÜL 386

Dissipative defects in ultracold quantum gases — •Matthias Scholl, Arne Ewerbeck, Andreas Vogler, Peter Würtz, Vera Guarrera, Giovanni Barontini, and Herwig Ott — Fachbereich Physik, Universität Kaiserslautern

We study the evolution of a Bose-Einstein condensate subjected to a local dissipative defect. In our experiment, we locally remove atoms from the cloud by ionizing them with a focussed electron beam. By analyzing the time resolved ion signal, we explore the decay dynamics of the BEC. Theoretically, we model the decay by a numerical simulation of the Gross-Pitaevskii equation with an imaginary potential.