Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 21: Ultracold Atoms (Trapping and Cooling)
Q 21.7: Talk
Tuesday, March 10, 2020, 15:45–16:00, f442
An Optical Dipole Trap in a Drop Tower - the Primus Project — •Christian Vogt1, Marian Woltmann1, Sven Herrmann1, Claus Lämmerzahl1, and The Primus-Team1,2 — 1University of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 Bremen — 2Institut für Quantenoptik, LU Hannover
Atom interferometers based on cold atoms have been turned into effective tools to measure weakest forces in the last decades. The sensitivity of these devices scales with the square of interrogation time, normally limited by the time of free fall. Operating atom interferometers in microgravity, like in the drop tower in Bremen, can extend this time from hundreds of milliseconds to several seconds. The leading technology for ultra-cold atoms in microgravity is based on so called atom chips, generating magnetic traps with low power consumption. We focus on an alternative approach based on an optical dipole trap. These come with several advantages like the ability to trap all magnetic sub-states or apply Feshbach resonances. This talk will present recent results from the optical trapping of atoms in microgravity and highlight the benefits of a combined approach including atom chip and dipole trap. 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.