SAMOP 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 7: Precision Measurements
Q 7.14: Poster
Dienstag, 21. September 2021, 16:30–18:30, P
Measuring Gravity with Very Long Baseline Atom Interferometry — •Ali Lezeik, Klaus Zipfel, Dorothee Tell, Christian Meiner, Chrisitan Schubert, Ernst M. Rasel, and Dennis Schlippert — Leibniz Universität Hannover- Insititute für Quantenoptik, Germany
Matter-wave interferometers with ultracold atoms are highly sensitive to inertial quantities. The Very Long Baseline Atom Interferometry (VLBAI) facility at the Hannover Institute of Technology (HiTech) aims to exploit the linear scaling of this sensitivity with the free fall time of the atoms in a 10 m baseline [1]. This will enable precision measurements of gravitational acceleration, as well as tests of the weak equivalence principle and gravitational redshift [2,3].
We present the current status of the VLBAI, the 20cm diameter vacuum chamber with the high performance magnetic shield that achieved residual fields below 4 nT and longitudinal inhomogeneities below 2.5 nT/m over 8 m along the longitudinal direction. We additionally report on the source of laser-cooled ytterbium atoms delivering 1 × 109 atoms/s in a 3D magneto-optical trap. With such upgrades, tests of the universality of free fall with atomic test masses beyond the 10−13 level can be achieved.
[1] J. Hartwig et al., New J. Phys. 17 (2015)
[2] D. Schlippert et al., arXiv:1909.08524 (2019)
[3] S. Loriani et al., Sci. Adv. 5 (2019)