Logo Leibniz Universität Hannover
Logo: Sonderforschungsbereich geo-Q
Logo Leibniz Universität Hannover
Logo: Sonderforschungsbereich geo-Q
  • Zielgruppen
  • Suche
 

Gravity sensing with very long baseline atom interferometry

VLBAI assembly
VLBAI assembly

“Very long baseline atom interferometers” (VLBAI) represent very promising tools to evaluate both variations in absolute gravity and gravity gradients up to higher-order terms. They are expected to advance the resolution of today’s atomic gravimeters by several orders of magnitude via increasing both the interrogation time in the range of seconds and the separation between the atomic trajectories, which will form the interferometer, on the scale of meters. Depending on the topology chosen for the interferometer, these devices can determine gravity or its derivatives very accurately. In this project we will realize a prototype interferometer which will form a test bed for VLBAI. We will utilize a new facility for interferometry in a 10 m vacuum tube (major research instrumentation) located at the HITec institute at the Leibniz Universit¨at Hannover. The methods, explored in this project, will not only be applied for geodetic measurements, but also for a the quantum-test of Einstein’s Equivalence Principle at an unprecedented level. Moreover we will investigate the scaling of the sensitivity for varying baselines and analyze different topologies which make it possible to distinguish between different geodetic signals. This work is complementary to the work of our partners in Bordeaux, with whom we cooperate to realize an atom interferometric gravity antenna (MIGA) for sensing all spatial directions. Our research will be of interest for other future applications of atom interferometers, such as detection of space-time strain.

 

 

Scientists working on this project

Dr. Naceur Gaaloul
email: gaalouliqo.uni-hannover.de

phone: +49 511 762-17455
details

Christian Meiners
email: meinersiqo.uni-hannover.de

phone: +49 511 762-19192
details

Dr. Dipankar Nath
email: nathiqo.uni-hannover.de

phone: +49 511 762-19192
details

Dr. Dennis Schlippert
email: schlippertiqo.uni-hannover.de

phone: +49 511 762-19192
details

Dr. Christian Schubert
email: schubertiqo.uni-hannover.de

phone: +49 511 762-4107
details

Dorothee Tell
email: telliqo.uni-hannover.de

details

Étienne Wodey
email: woodeyiqo.uni-hannover.de

phone: +49 511 762-4107
details

Selected Publications


Peer-Reviewed Literature

Hartwig J., Abend S., Schubert C., Schlippert D., Ahlers H., Posso-Trujillo K., Gaaloul N., Ertmer W. and Rasel E. M. (2015): Testing the universality of free fall with rubidium and ytterbium in a very large baseline atom interferometer, New J. Phys. 17, 035011 (2015)
DOI: 10.1088/1367-2630/17/3/035011
arXiv: 1503.01213


Non Peer-Reviewed Literature

Schlippert D., Albers H., Richardson L. L., Nath D., Heine H., Meiners C., Wodey É., Billon A., Hartwig J., Schubert C., Gaaloul N., Ertmer W. and Rasel E. M. (2016): Ground Tests of Einstein's Equivalence Principle: From Lab-based to 10-m Atomic Fountains, Proceedings of the 50th Rencontres de Moriond ”Gravitation: 100 years after GR”, La Thuile (Italy), 21-28 March
arXiv: 1507.05820


Presentations, Talks and Posters

Schlippert D. (2015): Gravity sensing with VLBAI, EGU 2015