Magnetism in ultracold quantum gases |
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| Authors: | H Schmaljohann M Erhard J Kronjägert M Kottke S Van Staa J J Arlt |
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| Affiliation: | 1. Institut für Laser-Physik, Universit?t Hamburg , Luruper Chaussee 149, 22761, Hamburg, Germany;2. Institut für Quantenoptik, Universit?t Hannover , Welfengarten 1, 30167, Hannover, Germany |
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| Abstract: | Abstract We study the static and dynamic magnetic properties of ultracold quantum gases, in particular the spinor physics of F = 1 and F = 2 Bose-Einstein condensates of 87Rb atoms. Our data lead to the conclusion, that the F = 2 ground state of 87Rb is polar, while we find the F = 1 ground state to be ferromagnetic. The dynamics of spinor systems is linked to an interplay between coherent mean-field interactions, losses and interactions with atoms in the thermal cloud. Within this rich parameter space we observe indications for coherent spinor dynamics and novel thermalization regimes. |
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