ResearchProjects
Research Area A - Frontiers of quantum sensors on ground

Research Area A

Frontiers of quantum sensors on ground

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.

Head of Research Area A

Prof. Dr. Ernst Rasel
Prof. Dr. Ernst Rasel

PUBLICATIONS RESEARCH AREA A

Albers H, Corgier R, Herbst A, Rajagopalan A, Schubert C, Vogt C et al. All-optical matter-wave lens using time-averaged potentials. Communications Physics. 2022 Mar 16;5(1). 60. doi.org/10.48550/arXiv.2109.08608, doi.org/10.1038/s42005-022-00825-2

Belenchia A, Carlesso M, Bayraktar Ö, Dequal D, Derkach I, Gasbarri G et al. Quantum physics in space. Physics reports. 2022 Mar 11;951:1-70. doi.org/10.1016/j.physrep.2021.11.004

Bondza S, Lisdat C, Kroker S, Leopold T. Two-Color Grating Magneto-Optical Trap for Narrow-Line Laser Cooling. Physical review applied. 2022 Apr 1;17(4). 044002. doi.org/10.1103/physrevapplied.17.044002

Krawinkel T, Elmaghraby A, Schön S. Exploring the Technical Limits of GNSS-based Frequency Transfer. In Proceedings of the 53rd Annual Precise Time and Time Interval Systems and Applications Meeting. 2022. p. 188-198 doi.org/10.33012/2022.18288

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.org/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.org/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. doi.org/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. doi.org/10.1038/s41598-021-95334-7