Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 9: Matter wave optics II
Q 9.2: Vortrag
Montag, 17. März 2014, 14:15–14:30, DO26 208
Multidimensional nonlinear modes in BEC condensates with strongly non-uniform repulsive nonlinearity — •Rodislav Driben1, Yaroslav Kartashov2, Boris Malomed3, Torsten Meier1, and LLuis Torner2 — 1Department of Physics & CeOPP, University of Paderborn — 2ICFO-Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean Technology Park, E-08860 Castelldefels (Barcelona) — 3Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
We demonstrate stable families of 3-dimensional solitons and toroidal-shaped votices in BEC condensates with self-trapping induced by a spatially growing strength of the repulsive nonlinearity [1]. The application of a moderate torque to the vortex torus initiates its persistent precession mode, with the torus axle moving along a conical surface. Strong torque nearly destroys the vortex; nonetheless, it restores itself, with the axle oriented according to the vectorial addition of angular momenta. Interaction between several 3D condensates is further considered in this setting, demonstrating interesting dynamical effects. The analysis is performed by analytical methods in combination with comprehensive numerical simulations.
[1] R.Driben, Y.Kartashov, B. A. Malomed, T. Meier, and L.Torner, "Soliton gyroscopes in media with spatially growing repulsive nonlinearity" Phys. Rev. Letters in Press,(2013).