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Q: Quantenoptik

Q 1: Poster: Atom Optics

Q 1.15: Poster

Monday, April 2, 2001, 12:30–15:00, AT2

Dynamics of vortices in Bose-Einstein-Condensates with constrained geometries — •Thomas Schulte¹, Luis Santos¹, Anna Sanpera¹, Janne-Pietri Martikainen², and Kalle-Antti Suominen³ — ¹Institut fuer Theoretische Physik, Appelstr. 2, D-30167 Hannover, Germany — ²Helsinki Institute of Physics, PL 9, FIN-00014 Helsingin yliopisto, Finland — ³Departement of Applied Physics, University of Turku, FIN-20014, Finland

We have analyzed the interaction of vortices in Bose-Einstein-Condensates with constrained geometries, showing that the trap boundaries strongly modify the vortex dynamics. In particular we have numerically and analytically studied the interaction of 2 vortices in a 2-D ring. We show that depending on the relative vortex circulation and the relative position of the vortex lines, different regimes of vortex dynamics can be expected.