Hannover 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 13: Posters: Quantum Optics and Photonics I
Q 13.18: Poster
Montag, 9. März 2020, 16:30–18:30, Empore Lichthof
A high-flux source of rubidium Bose-Einstein condensates for atom interferometry — •Dorothee Tell, Christian Meiners, Henning Albers, Dennis Schlippert, and Ernst M. Rasel — Leibniz Universität Hannover, Institut für Quantenoptik, Germany
Using Bose-Einstein condensates (BEC) for atom interferometry enables increased sensitivity for inertial measurements. A large number of atoms in the interferometer lowers the shot-noise of the readout, while a high repetition rate - usually limited by the duration of BEC creation - is needed for fast averaging and increased temporal resolution. Therefore we aim for a fast source producing a high number of atoms in a quantum-degenerate state.
We present the implementation of a rubidium source which uses a sequence of a dual MOT system loading 5· 109 atoms in 200 ms and a high power crossed optical dipole trap to create BECs. Dynamically shaped potentials are used to optimize the speed and efficiency of evaporative cooling towards unprecedented BEC flux. Finally, we evaluate the impact of this source on experiments in a 10 m baseline in the Hannover Very Long Baseline Atom Interferometry facility (VLBAI).
This work is funded by the DFG as a major research equipment (VLBAI facility), via the CRCs 1128 “geo-Q” and 1227 “DQ-mat”, under Germany’s Excellence Strategy (EXC 2123) “QuantumFrontiers”, and by the Federal Ministry of Education and Research (BMBF) through the funding program Photonics Research Germany (contract number 13N14875).