Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Precision Measurements II (joint session Q/A)
Q 62.8: Vortrag
Freitag, 15. März 2024, 12:45–13:00, HS 1221
Double Bragg atom interferometry with Bose-Einstein condensates in microgravity — •Julia Pahl1, Anurag Bhadane2, Dorthe Leopoldt3, Sven Herrmann4, André Wenzlawski2, Sven Abend3, Patrick Windpassinger2, Ernst M. Rasel3, Markus Krutzik1,5, and The QUANTUS Team1,2,3,4,6,7 — 1HU Berlin — 2JGU Mainz — 3LU Hannover — 4U Bremen — 5FBH Berlin — 6U Ulm — 7TU Darmstadt
QUANTUS-2 is the 2nd generation mobile atom interferometer operating at the ZARM drop tower in Bremen. With its high-flux, atom chip-based atomic rubidium source, it serves as a pathfinder for future space missions. We are examining key technologies like the generation of Bose-Einstein condensates (BECs), implementation of magnetic lensing or application of various atom interferometry geometries with interferometry times over one second. In this talk, we present our latest results on double Bragg atom interferometry of magnetically lensed rubidium ensembles, using asymmetric Mach-Zehnder interferometers. By exploiting the emerging interferometer fringes we can visualize the anharmonicities of the magnetic lens and determine the interferometer contrast as well as the effective kinetic energy of the ensemble in a single shot. Interferometer times of 2T≈1.7 s have been reached.
This project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Climate Action under grant number DLR 1952-1957.