Mainz 2026 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 39: Poster – Precision Measurement (joint session Q/A)
A 39.4: Poster
Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG
Double Bragg atom interferometry with Bose-Einstein condensates in microgravity — •Anurag Bhadane1, Dorthe Leopoldt2, Priyanka Barik2, Govindarajan Prakash3, Julia Pahl4, Sven Herrmann3, Andre Wenzlawski1, Sven Abend2, Markus Krutzik4,5, Patrick Windpassinger1, Ernst Rasel2, and The Quantus Team1,2,3,4,6,7 — 1JGU Mainz — 2LU Hannover — 3ZARM, U Bremen — 4HU Berlin — 5FBH Berlin — 6U Ulm — 7TU Darmstadt
The Quantus-2 device is a mobile, high flux 87Rb Bose-Einstein condensate(BEC) interferometer optimized for microgravity platforms such as the Bremen Drop Tower and the GraviTower Bremen Pro, and serves as a pathfinder for future space based quantum sensors. A magnetic quadrupole lens combined with collective mode excitation of the BEC enables interferometry times beyond one second using double Bragg diffraction. At these durations, systematic effects like parasitic wavefront distortions, which imprint spatial phase variations across the atomic cloud, together with shot to shot pulse amplitude fluctuations reduce the achievable contrast. We present the dominant contrast loss mechanisms, supported by quantitative performance characterization, and outline mitigation strategies for long duration interferometry in microgravity.
This project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Energy under grant numbers DLR 50WM1952-1957 and DLR 50 WM2450A-F.
Keywords: Atomic Physics; Ultracold-Atoms; Bose-Einstein Condensate; Microgravity; Atom-Interferometry