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Q: Fachverband Quantenoptik und Photonik

Q 22: Precision Measurements and Metrology I (joint session Q/A)

Q 22.3: Poster

Dienstag, 15. März 2022, 16:30–18:30, P

Towards high-precision Bragg atom interferometry using rubidium Bose-Einstein condensates — •Dorothee Tell¹, Christian Meiners¹, Henning Albers¹, Ann Sabu^1,2, Klaus H. Zipfel¹, Ernst M. Rasel¹, and Dennis Schlippert¹ — ¹Leibniz Universität Hannover, Institut für Quantenoptik, Deutschland — ²Cochin University of Science and Technology (CUSAT), Kerala, India

The Very Long Baseline Atom Interferometry (VLBAI) facility at the university of Hannover aims for high precision measurements of inertial quantities. Goals span from contributions to absolute geodesy as well as fundamental physics at the interface between quantum mechanics and general relativity. The VLBAI facility makes use of a freely falling ensemble of ultracold atoms as a probe for inertial forces, interrogating the atoms in an interferometer scheme using near-resonant light pulses.

Here we present details of the fast, all-optical preparation of rubidium Bose-Einstein condensates in time-averaged dynamic optical dipole traps. We will show first proof-of-principle Bragg beam splitting and interferometry in a reduced baseline of up to 30 cm. Prospects and challenges of extending the free fall distance to more than 10 m in the frame of the VLBAI facility will be discussed.

We acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 434617780 - SFB 1464 as well as CRC 1227 (DQ-mat), project B07. The VLBAI facility is a major research equipment funded by the DFG.