Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.31: Poster

Donnerstag, 9. März 2017, 17:00–19:00, P OG2

Cold quantum gases in adaptive scales — •Jan Teske and Reinhold Walser — Institut für Angwandte Physik, Technische Universität Darmstadt, Hochschulstraße 4A, Darmstadt, D-64289, Germany

The research field of the QUANTUS collaboration are ultracold quantum gases in weightlessness. These experiments are performed at the drop tower in Bremen (ZARM). During the free fall of several seconds the released Bose-Einstein condensate reaches macroscopic system sizes being used for precise measurements of accelerations and rotations [1, 2].

For the analysis of the complex matter wave-optics setup, we have developed a software package, MatterWaveSim, including classical ray tracing, beam splitter and magnetic chip trap simulations. In the present contribution we present appropriate numerical methods for Bose-Einstein condensates. We introduce introduce adaptive scales [3] for modelling finite temperature dynamics of an ultracold Bose gas. In particular we study the long time expansion and delta kick cooling with realistic magnetic chip traps.
G. Nandi, R. Walser, E. Kajari, and W. P. Schleich. Dropping cold quantum gases on earth over long times and large distances. Phys. Rev. A, 76, 063617 (2007).
H. Müntinga et al. Interferometry with Bose-Einstein Condensates in Microgravity. Phys. Rev. Lett. 110, 093602 (2013).
Y. Castin, R. Dum. Bose-Einstein Condensates in Time Dependent Traps. Phys. Rev. Lett. 77 (1996).