Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 41: Poster Session IIIa

A 41.19: Poster

Donnerstag, 8. März 2018, 16:15–18:15, Orangerie

Matter wave abberations in magnetic chip traps — •Srihari Srinivasan and Reinhold Walser — Institut fuer Angewandte Physik, TU Darmstadt

The first Bose-Einstein Condensate (BEC) and atom interferometry in space was reported in early 2017 by the MAIUS sounding rocket experiment [1,2]. The setup uses an atom chip magnetic trap to obtain a BEC. Magnetic chip traps tend to show anharmonicities as atoms are at a close range to conductors on the chip. These anharmonicities present challenges for the experiment sequence in the form of anisotropic expansion of the BEC which are matter wave analogues of optical aberrations, the resulting inhomogeneities in number density and as anomalous collective modes [3] during time dependent processes.
We characterize the anharmonicity of the chip trap using the excited collective modes. We also study the influence of non-adiabatic dynamics during trap manipulation in the experiment sequence in an effort to help suppress anomalous collective modes. This is done as part of a comprehensive simulation suite for an atom interferometer being developed for comparison with experimental data.

[1] MAIUS Mission: http://www.spiegel.de/wissenschaft/technik/bose-einstein-kondensat-erstmals-im-all-erzeugt-a-1131279.html

[2] A. Cho, Science, 357(6355), 986 (2017).

[3] C. Huepe et al., PRA 68, 023609 (2003), S. Ronen et al., PRA 74, 013623 (2006).