Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 75: Matter Wave Optics II
Q 75.2: Talk
Friday, March 27, 2015, 14:45–15:00, K/HS2
Atom interferometry with BECs and Double Bragg Diffraction — •Martina Gebbe1, Sven Abend2, Matthias Gersemann2, Hauke Müntinga1, Holger Ahlers2, Ernst Maria Rasel2, Claus Lämmerzahl1, and The QUANTUS-Team1,2,3,4,5,6,7,8,9 — 1ZARM, Universität Bremen — 2Institut für Quantenoptik, LU Hannover — 3Institut für Physik, HU Berlin — 4Institut für Laser-Physik, Universtität Hamburg — 5Institut für Quantenphysik, Universität Ulm — 6Institut für angewandte Physik, TU Darmstadt — 7MUARC, University of Birmingham — 8FBH, Berlin — 9MPQ, Garching
Current inertial sensitive atom interferometry devices operate mostly with sources of laser cooled atoms. The velocity distribution and finite size of these sources limit the efficiency of employed beam splitters and the analysis of systematic uncertainties. These limits can be overcome by the use of ultra-cold sources such as Bose-Einstein condensates or even delta-kick cooled atomic ensembles. Atomic chip technologies offer the possibility to generate a BEC and perform delta-kick cooling in a fast and reliable away. We show the application of a symmetric Bragg beam splitting technique, called double Bragg diffraction which offers interesting features and enables new geometries for future atom interferometers. Moreover, we have realized an atomic gravimeter using the chip as retroreflector demonstrating the use as compact inertial sensor. 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 50 1131-1137 (QUANTUS-III).