Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

Q 25.23: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Optical dipole trapping of Rubidium in microgravity — •Marian Woltmann, Yann Sperling, Jan Stiehler, Marius Prinz, and Sven Herrmann — Center of Applied Space Technology and Microgravity (ZARM), University of Bremen, Germany

The sensitivity of atom interferometric sensors typically scales with the squared interrogation time. Therefore space-borne atom interferometry offers the potential of highly increased senitivities that can be utilized for e.g. gravimetric measurements as well as for tests of fundamental physical principles.
Within the PRIMUS project we develop a compact all-optical matterwave source in a drop tower experiment. The all-optical approach utilizing a λ=1064 nm crossed beam optical dipole trap enables the use of Feshbach resonances and offers the advantages of symmetric trapping potentials and magnetic substate insensitive trapping. With our drop tower setup we demonstrated rapid Bose-Einstein condensation of ⁸⁷Rb with a minimum evaporation time of t_evap=1.3 s to reach a critical phase space density on ground, while now focusing on the efficient preparation in microgravity. The PRIMUS-project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Climate Action under grant number DLR 50 WM 2042.

Keywords: BEC; all-optical; dipole trap; microgravity; matter wave