Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects
Q 26.24: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Towards a Chip-Scale Quantum Gravimeter — •Julian Lemburg1, Joseph Muchovo1, Kai-Christian Bruns1, Vivek Chandra1, Sam Ondracek1, Hendrik Heine1, Waldemar Herr2, Christian Schubert2, and Ernst M. Rasel1 — 1Leibniz Universität Hannover, Institut für Quantenoptik — 2Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Satellitengeodäsie und Inertialsensorik (SI)
In the field of gravimetry, atom interferometry offers the perspective of a highly powerful tool for measuring gravity, with an expected residual uncertainty on the order of nm/s2. To enable in-field or space-borne experiments, the development of compact, lightweight devices with low power consumption is crucial. We address these challenges by using atom chips for a rapid production of Bose-Einstein condensates, which enable high contrast, the implementation of large momentum transfer processes, and control of systematic effects in atom interferometry. To date, atom chips have either been equipped with a grating to simplify the optical setup for the magneto-optical trap (requiring only a single input beam) or with a mirror designed for atom interferometry. In our approach, we aim to integrate both functionalities.
In this poster, we present our concept and initial results of the optical characterization using test chips that combine the features of a grating and a mirror. These chips pave the way for performing both laser cooling and atom interferometry using a single optical beam.
Keywords: Atom Chips; Compact Device; Atom Interferometry; Gravimetry