Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.42: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Atom-chip gravimetry with Bose-Einstein condensates — •Martina Gebbe1, Sven Abend2, Matthias Gersemann2, Hauke Müntinga1, Holger Ahlers2, Ernst M. Rasel2, Claus Lämmerzahl1, and The QUANTUS Team1,2,3,4,5,6,7 — 1ZARM, Uni Bremen — 2Institut für Quantenoptik, LU Hannover — 3Institut für Physik, HU Berlin — 4Institut für Laser-Physik, Uni Hamburg — 5Institut für Quantenoptik, Uni Ulm — 6Institut für angewandte Physik, TU Darmstadt — 7Institut für Physik, JGU Mainz
Due to their small spatial and momentum width ultracold Bose-Einstein condensates (BEC) or even delta-kick cooled (DKC) atomic ensembles are very well suited for high precision atom interferometry. We generate such an ensemble in a miniaturized atom-chip setup and apply Bragg beam splitting to perform different types of inertial sensitive measurements. Using the chip as a retroreflector we have realized a compact gravimeter and determined local g with an accuracy of 5 · 10−5 g limited by vibrational noise. We demonstrate that the sensitivity can be enhanced with the help of an optical lattice to relaunch the atoms and large momentum transfer beam splitters. Additionally, we introduce a symmetric Double-Bragg diffraction technique that offers interesting features. We exploit this to access the horizontal axis and demonstrate geometries that are also sensitive to rotations and gravity gradients. 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 numbers DLR 50WM1552-1557 (QUANTUS-IV-Fallturm).