Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.34: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Precision gravity measurements with Very Long Baseline Atom Inteferometry — •Christian Meiners, Dorothee Tell, Etienne Wodey, Dennis Schlippert, Christian Schubert, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Gottfried Wilhelm Leibniz Universität Hannover

Matter-wave interferometers are a novel method for probing inertial forces as rotations and accelerations. By using quantum objects as test masses they can reach extremely high stability and low systematic uncertainty. One direction of development of these sensors is the compactification to make them applicable in field geodesy whereas an other development is to extend the baseline from tens of centimeters to several meters, to increase the sensitivity which scales with the free fall time squared. Our very long baseline atom interferometer (VLBAI) will not only establish a complementary method to state of the art gradiometers and superconducting gravimeters when operated with a single species but also aims at quantum tests of the universality of free fall at levels comparable to the best classical tests and beyond by utilizing two different atomic species.

We present our strategies and recent progress on the construction of a VLBAI facility in Hannover, implementing ultra-cold samples of rubidium and ytterbium atoms, a magnetically shielded interferomtry region, and a state of the art vibration isolation.

The VLBAI facility is a major research equipment funded by the DFG. We also acknowledge support from the CRCs 1128 "geo-Q" and 1227 "DQ-mat" and the RTG 1729.