Abstract
Gravimetry with low uncertainty and long-term stability opens up new fields of research in geodesy, especially in hydrology and volcanology. The main limitations in the accuracy of current generation cold atom gravimeters stem from the expansion rate and the residual centre-of-mass motion of their atomic test masses. Our transportable quantum gravimeter QG-1 aims at overcoming these limitations by performing atom interferometry with delta-kick collimated Bose–Einstein condensates generated by an atom chip. With our approach we anticipate to measure the local gravitational acceleration at geodetic campaigns with an uncertainty less than 1 nm/s2 surpassing the state-of-the-art classic and quantum based systems. In this paper, we discuss the design and performance assessment of QG-1.
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E.M.R. and J. Mü initiated and supervised the project. J. Mü and L.T. assessed the geodetic demands on the instrument and the resulting design criteria. J. Ma., M.S., N.H., S.A., W.H. and E.M. R. designed the instrument. J. Ma., M.S. and N.H. built the instrument. N.H. and W.H. prepared the physics viewpoint and L.T. contributed the geodetic viewpoint to the manuscript. All authors critically reviewed and approved the final manuscript.
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Contribution to the Topical Issue “Quantum Technologies for Gravitational Physics”, edited by Tanja Mehlstäubler, Yanbei Chen, Guglielmo M. Tino and Hsien-Chi Yeh.
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Heine, N., Matthias, J., Sahelgozin, M. et al. A transportable quantum gravimeter employing delta-kick collimated Bose–Einstein condensates. Eur. Phys. J. D 74, 174 (2020). https://doi.org/10.1140/epjd/e2020-10120-x
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DOI: https://doi.org/10.1140/epjd/e2020-10120-x