# Berlin 2014 – wissenschaftliches Programm

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# Q: Fachverband Quantenoptik und Photonik

## Q 32: Poster: Quantum gases, ultracold atoms and molecules

### Q 32.51: Poster

### Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

**Basic properties of a dipolar Bose-Einstein condensate with dysprosium** — •Damir Zajec and Günter Wunner — 1. Institut für theoretische Physik, Universität Stuttgart

Dipolar Bose-Einstein condensates open the field of research of effects which are generated by the dipole-dipole interaction such as self-organization and pattern formation. One promising candidate for realizing a dipolar BEC is dysprosium, which has a dipolar moment of 10 Bohr magnetons. We perform grid calculations to determine the ground states of a dipolar BEC with dysprosium by means of the Gross-Pitaevskii equation. The split-operator method is used to apply a general time evolution operator to an initial state, where time evolution is mainly described by a series of Fourier transforms. Since this numerical scheme is computationally very demanding, the parallel computing architecture CUDA was used to implement the code. We present calculations of the dynamic expansion of the BEC and a stability diagram with respect to the orientation of the dipoles and the aspect ratio of the external confinement.