Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 52: Cold atoms VI - traps (joint session A/Q)

Q 52.1: Vortrag

Donnerstag, 8. März 2018, 10:30–10:45, K 0.011

Dipole trapping in the absence of gravity — •Christian Vogt1, Marian Woltmann1, Sven Herrmann1, Claus Lämmerzahl1, and The PRIMUS-Team1,21University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 Bremen — 2Institut für Quantenoptik, LU Hannover

Cold atoms have proven to be a useful toolbox with wide applications in testing the fundamentals of physics, e.g the weak equivalence principle which provides the cornerstone of Einstein's general relativity theory [1]. In the recent years great effort has been made to take advantage of these techniques in weightlessness. For example the first BEC in space was created and effective temperatures down to the pK regime were demonstrated in the drop tower in Bremen [2]. So far all of these result from atoms held in magnetic traps on atom chips. This talk will be about the first realization of a dipole trap in weightlessness. Proven its worth on ground , dipole traps have never before been operated in microgravity, although they can produce high number BECs and have unique advantages like the ability to apply feshbach resonances. Our experiment, the PRIMUS project, uses the drop tower in Bremen witch offers up to 4.7s of microgravity time in drop mode. The talk will focus on the dimension of evaporation and the reduction of evaporation time. The PRIMUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under grant number DLR 50 WM 1642. [1] D. Schlippert et al., Phys. Rev. Lett. 112, 203002 (2014) [2] Jan Rudolph,(PhD Thesis), Leibniz University Hannover, 2016.

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