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Q: Fachverband Quantenoptik und Photonik
Q 70: Precision Measurements: Atom Interferometry II (joint session Q/A)
Q 70.8: Talk
Friday, March 10, 2023, 16:15–16:30, F342
BEC atom interferometry techniques for very long baselines — •Dorothee Tell1, Vishu Gupta1, Henning Albers1, Klaus H. Zipfel1, Christian Schubert1,2, Ernst M. Rasel1, and Dennis Schlippert1 — 1Leibniz Universität Hannover, Institut für Quantenoptik — 2German Aerospace Center (DLR), Institute for Satellite Geodesy and Inertial Sensing, Hannover, Germany
The Very Long Baseline Atom Interferometry (VLBAI) facility at the university of Hannover aims for high precision measurements of inertial quantities. Goals span from absolute gravimetry to fundamental physics at the interface between quantum mechanics and general relativity. To this end, the VLBAI facility will make use of ultracold atoms freely falling in a 10 m long vacuum tube with well-known bias forces. We will utilize Bragg atom optics to realize Mach-Zehnder-like geometries sensitive to acceleration.
Here we present the source of rubidium Bose-Einstein condensates ready to be installed at the bottom of the VLBAI baseline for interfer- ometry on fountain trajectories. We demonstrate the necessary meth- ods and schemes, such as matter-wave lenses, Bragg beam splitters and Bloch oscillations, in proof-of-principle experiments performed in the cm-scale baseline available in the source chamber. We discuss prospects and challenges of extending the free fall distance to 10 m.
This work is funded by the DFG as a major research equipment, via Project-ID 434617780 - SFB 1464 TerraQ and Project-ID 274200144 - SFB 1227 DQ-mat, and under Germany’s Excellence Strategy - EXC-2123 QuantumFrontiers - Project-ID 39083796.