Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects
Q 26.27: Poster
Tuesday, March 11, 2025, 14:00–16:00, Tent
Utilizing Bose-Einstein condensates for atom interferometry in the transportable Quantum Gravimeter QG-1 — •Smit Kanawade1, Pablo Nuñez von Voigt1, Nina Heine1, Waldemar Herr2, Jürgen Müller3, and Ernst M. Rasel1 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Hannover, Germany — 2Deutsches Zentrum für Luft und Raumfahrt, Institut für Satellitengeodäsie und Inertialsensorik, Hannover, Germany — 3Leibniz Universität Hannover, Institut für Erdmessung, Hannover, Germany
Atom interferometers have demonstrated unprecedented sensitivity and stability for sensing inertial quantities in complex lab-based environments. The Quantum Gravimeter (QG-1) aims to transfer this ability to a transportable device for performing long-term geodetic measurements of the acceleration due to gravity with sub-nm/s2 uncertainty. The reduced SWaP (size, weight, and power) of the sensor is realized using atom chip technology for efficient source preparation of delta-kick collimated 87Rb Bose-Einstein condensate. Using a lensed cloud with a low expansion rate allows spatially resolving absorption imaging compared to cold atom sensors, which have to rely on fluorescence imaging for detection. The atom chip provides precise control over the release of the probe cloud, and together with the spatial information of the condensate’s center of mass motion from absorption imaging, it can help minimize the residual horizontal velocity. This provides a better understanding and control of the systematic effects, such as Coriolis bias and characterization of wavefront aberrations.
Keywords: Bose-Einstein condensates; Atom interferometry; Quantum Sensor; Gravimetry