Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 63: Ultracold Atoms (Trapping and Cooling)

Q 63.8: Talk

Friday, March 15, 2019, 12:15–12:30, S SR 211 Maschb.

Realistic simulations of Bose-Einstein condensates in magnetic traps on graphics processing units — •Lev Plimak and Reinhold Walser — Institut fuer Angewandte Physik, Technische Universitaet Darmstadt, Hochschulstr. 4a, 64289 Darmstadt

Experiments with Bose-Einstein condensates in microgravity [1] allow for much longer expansion times than similar experiments in gravity. This poses a new challenge for the numerical-simulation community. In particular, asymmetry and anharmonicity of real magnetic traps may play a deciding role in matching theory to the experiment. Distributed computing on graphical processing units [2] (GPUs) is a natural enviroment for such simulations.

We present results of a direct simulation of the Rb87 condensate in the QUANTUS-2 release trap [1]. The trap potential is calculated using the actual QUANTUS-2 chip geometry without simplifications of any kind. Mathematical methods suited for the GPU environment are discussed.

[1] D. Becker et. al., Space-borne Bose-Einstein condensation for precision interferometry}, Nature, 562 391 (2018).

[2] https://en.wikipedia.org/wiki/

General-purpose_computing_on_graphics_processing_units