Hannover 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 28: Poster Session - Atomic Physics IV
A 28.28: Poster
Donnerstag, 12. März 2020, 16:00–18:00, Empore Lichthof
QUANTUS-2 - Quantum Gases under Microgravity — •Peter Stromberger1, Merle Cornelius2, Julia Pahl3, Christian Deppner4, André Wenzlawski1, Patrick Windpassinger1, and the QUANTUS-Team1,2,3,4,5,6 — 1JGU Mainz — 2U Bremen — 3HU Berlin — 4LU Hannover — 5U Ulm — 6TU Darmstadt
QUANTUS-2 is a mobile rubidium BEC experiment used for experiments under microgravity in the drop tower in Bremen. Using magnetic lensing we decreased the expansion rate of the BEC in all three dimensions below 100 µ m/s allowing for observations after evolution times greater than 2 seconds and enhancing the sensitivity of atom interferometers. We present preparatory measurements for the implementation of a double Bragg Mach-Zehnder type interferometer (MZI) under microgravity and the determination of the gravitational acceleration with a single Bragg MZI and a matter-wave cavity gravimeter.
Furthermore, under microgravity it is possible to implement dressed state shell potentials and confining Bose gases in two dimensions. Studying a quasi two-dimensional Bose gas allows for investigation of the Berezinskii-Kosterlitz-Thouless (BKT) phase transition. We intend to create shell potentials by radio-frequency dressing of magnetic sub-states of the hyperfine ground-state. We will discuss our progress towards implementation of dressed state potentials at the QUANTUS-2 experiment and present simulations and first experimental results.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economic Affairs and Energy under grant numbers DLR 50 WM 1552-1557.