Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology
Q 16.64: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
A compact gravimeter based on Bragg diffraction of a Bose-Einstein condensate — •Maral Sahelgozin1, Jonas Matthias1, Ernst Maria Rasel1, and The QUANTUS-TEAM2,3,4,5,6,7,8,9 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, Universität Bremen — 3Institut für Physik, HU Berlin — 4Institut für Laser-Physik, Universität Hamburg — 5Institut für Quantenphysik, Universität Ulm — 6Institut für angewandte Physik, TU Darmstadt — 7MUARC, University of Birmingham — 8FBH, Berlin — 9MPQ, Garching
We demonstrate a gravimeter using Bragg scattering in our atom-chip based QUANTUS-I apparatus in order to investigate new tools for atomic gravimeters. The low momentum spread of a BEC collimated by a magnetic lens is expected to reduce the systematic error arising from wavefront inhomogeneities of the beam splitting light fields, which is a major limitation to the precision of current generation atomic gravimeters. On this poster, we discuss the application of atom chip technology to atomic gravimetry under consideration of effective atomic flux, atomic sample temperature equivalent, and compactness of the experimental setup, which atom chips are capable to provide. Moreover, we study the application of multi-photon Bragg scattering and new interferometer schemes accessible with atomic samples of low momentum spread in order to increase the sensitivity while keeping the device size small.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50WM1131.