Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.36: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
Testing the Universality of Free Fall with cold atoms — •Henning Albers, Dipankar Nath, Logan L. Richardson, Dennis Schlippert, Christian Schubert, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover
The development of cold atom sensors has given rise to a unique and broad field of applications. They can be used for inertial sensing and as well as fundamental tests of the laws of physics. By performing a differential measurement of the Earth’s local gravitational acceleration, g, of two distinct atomic species, namely 39K and 87Rb, we are able to provide a sensitive test of the Universality of Free Fall (UFF) with atomic test masses [1].
In this work, we show the recent progress towards testing the UFF with an inaccuracy on the level of 10−9. To reach this goal we utilize an optical dipole trap at 1960 nm. In addition, the correction of ground coupled inertial noise, measured by a commercial seismometer, in an atom interferometer is an important aspect, both for the realization of transportable atom gravimeters, as well as the 10 m Very Long Baseline Atom Interferometer (VLBAI) apparatus working with Rb and Yb [2].
[1] D. Schlippert et al., Phys. Rev. Lett. 112, 203002 (2014)
[2] J. Hartwig et al., New J. Phys. 17, 035011 (2015)