Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 29: Precision Measurements and Metrology (Atom Interferometry) (joint session Q/A)
A 29.4: Vortrag
Mittwoch, 7. März 2018, 15:00–15:15, K 2.013
Large momentum transfer in a dual lattice configuration — •Matthias Gersemann1, Sven Abend1, Christian Schubert1, Martina Gebbe2, Ernst M. Rasel1, and the QUANTUS team1,2,3,4,5,6 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, Uni Bremen — 3Institut für Physik, HU zu Berlin — 4Institut für Quantenphysik, Uni Ulm — 5Institut für Angewandte Physik, TU Darmstadt — 6Institut für Physik, JGU Mainz
Bose-Einstein condensates (BEC) in combination with large momentum transfer beam splitters are a key component for future infrasound atomic gravitational wave detectors. For this reason we developed a new method for symmetric scalable large momentum separation using the combination of double Bragg diffraction and Bloch oscillations in a dual-lattice configuration. The basic principle consists of an initial splitting via Double Bragg diffraction and a subsequent acceleration by Bloch oscillations. This sequence enables the transfer of up to 1008 ℏ k in a single beam splitter and 408 ℏ k when implemented in an atom interferometer, limited by technical constraints. Further perspectives and limits are investigated and already show that this technique is also applicable for sensitivity enhancements of devices with smaller scales.
This work is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) due to an enactment of the German Bundestag under grant number DLR 50WM1552-1557 (QUANTUS-IV-Fallturm), the Deutsche Forschungsgemeinschaft (DFG) in the scope of the SFB 1128 geo-Q and "Niedersächsisches Vorab" through QUANOMET.