Research Area A develops new quantum sensors for application in geodesy, namely clocks and atomic gravity sensors, both in compact transportable and in large-scale stationary configurations.
Large-scale devices such as a new 10 m atom fountain VLBAI (Very Large Baseline Atom Interferometry) will enable experimental gravimetry with very high sensitivity. Transportable devices will be employed for observing temporal gravity and mass changes in regional campaigns, but the atom gravimeters have to be downsized considerably for field use. For this purpose, we develop chip-scale atomic gravimeters with BEC (Bose Einstein Condensate) atom sources.
The second building block of Research Area A is the operation and advancement of optical clocks and fibre connections to create clock networks. The measurement of relativistic gravitational redshift by optical clocks opens an entirely new toolbox with a height resolution beyond classical geodetic techniques.
Projects of Research Area A
Head of Research Area A
Prof. Dr. Ernst Rasel
Phone
Prof. Dr. Ernst Rasel
Phone
Publications Research Area A
Showing results 21 - 25 out of 25
Krawinkel T, Schön S, Bauch A. Recent and Future Activities at Leibniz University Hannover in GNSS Frequency Transfer. In 2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS). IEEE. 2021. (Proceedings of the IEEE International Frequency Control Symposium). doi: 10.1109/EFTF/IFCS52194.2021.9604309
Lisdat C, Dörscher S, Nosske I, Sterr U. Blackbody radiation shift in strontium lattice clocks revisited. Physical Review Research. 2021 Dec 9;3(4):L042036. doi: 10.1103/physrevresearch.3.l042036
Pelzer L, Dietze K, Kramer J, Dawel F, Krinner L, Spethmann N et al. Tailored optical clock transition in 40Ca+. Measurement: Sensors. 2021 Dec;18:100326. Epub 2021 Sept 30. doi: 10.1016/j.measen.2021.100326
Schubert C, Abend S, Gersemann M, Gebbe M, Schlippert D, Berg P et al. Multi-loop atomic Sagnac interferometry. Scientific Reports. 2021 Dec;11(1):16121. Epub 2021 Aug 9. doi: 10.1038/s41598-021-95334-7
Heine N, Matthias J, Sahelgozin M, Herr W, Abend S, Timmen L et al. A transportable quantum gravimeter employing delta-kick collimated Bose–Einstein condensates. European Physical Journal D. 2020 Aug 25;74(8):174. doi: 10.1140/epjd/e2020-10120-x, 10.15488/10683
