Hannover 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.43: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Mobile quantum gravity sensor with unprecedented stability — •Bastian Leykauf, Christian Freier, Vladimir Schkolnik, Matthias Hauth, Markus Krutzik, and Achim Peters — Institut für Physik, Humboldt-Universität zu Berlin, Germany
The gravimetric atom interferometer GAIN is based on interfering ensembles of laser-cooled 87Rb atoms in a fountain setup, using stimulated Raman transitions. Its transportable design allows to measure local gravity at sites of geodetic and geophysical interest.
We compared the performance of our instrument with falling corner-cube and superconducting gravimeters in two measurement campaigns in Germany and Sweden and demonstrated continuous absolute gravity measurements over several days with a stability of 0.5 nm/s2, the best reported value for absolute gravimeters to date [1]. Due to effective control over systematic effects, including wavefront distortions of the Raman beams [2], the measured gravity value’s accuracy can be specified at 38 nm/s2.
We will discuss the experimental apparatus, the latest measurements and future improvements, including our progress towards a gradiometer based on a juggling atom fountain.
[1] Freier et al. Mobile quantum gravity sensor with unprecedented stability, submitted.
[2] Schkolnik et al. The effect of wavefront aberrations in atom interferometry, Applied Physics B (2015).