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SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 59: Poster IV

Q 59.10: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

The Very Long Baseline Atom Interferometry facility for high precision gravity measurement — •Ali Lezeik1, Mario Montero1, Constantin Stojkovic1, Klaus H. Zipfel1, Dorothee Tell1, Vishu Gupta1, Henning Albers1, Sebastian Bode1, Jonas Klussmeyer1, Ernst M. Rasel1, Christian Schubert1,2, and Dennis Schlippert11Leibniz Universität Hannover, Institut für Quantenoptik — 2Deutsches Zentrum für Luft und Raumfahrt, Institut für Satellitengeodäsie und Inertialsensorik

The 15m high Very Long Baseline Atom Interferometry (VLBAI) facility aims for sub nm/s2 gravity measurement sensitivities. Using light-pulse atom interferometry, the VLBAI facility enables to perform accurate measurements of inertial effects thus making it a useful device for metrology and tests of fundamental physics. The sensitivity of light-pulse atom interferometers depends on several factors one of which being the freefall time. A second-long free fall of the atoms allows to reach acceleration sensitivities of 1nm/s2, comparable to the best classical superconducting gravimeters. At the VLBAI facility, a freefall time of 2.8s can be reached. In addition, excellent control over the environment and a large atomic flux is necessary to reduce systematic effects and achieve shot-noise limited sensitivities.

We present the current status of the VLBAI facility and outline its distinguishing aspects that will include sources of ultracold ytterbium and rubidium, a 10m long UHV baseline magnetically shielded to below 1.5nT/m, and a inertial reference seismic attentuation system.

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