Atom interferometric gravity data acquisition with the transportable absolute Quantum Gravimeter QG-1

ORAL

Abstract

The transportable Quantum Gravimeter QG-1 derives the local gravity value from the interferometric signal of magnetically collimated Bose-Einstein condensates (BECs) released into free-fall and read out by absorption imaging. It aims to determine the gravity value with an uncertainty < 3 nm/s^2, an order of magnitude below the uncertainty of cold atom gravimeteres [1-3]. The minimized initial velocity and expansion rate of the collimated BEC, produced with our atom-chip-based source, enables the projected increase in accuracy. Employing BECs allows to drive high contrast interferometers with higher order Bargg transitions increasing the interferometer sensitivity. A BEC sample gives rise to additional systematic effects i.e. phase shifts driven by the mean field energy. Further the atom chip induces shifts stemming from black-body radiation. We discuss these effects and introduce the overall setup.

(1) C. Freier et al., J. Phys. Conf. Ser. 723

(2) R. Karcher, et al., New J. Phys 20.11

(3) A. Louchet-Chauvet et al., New J. Phys. 13

*Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy – EXC-2123 QuantumFrontiers –390837967 and under Project-ID 434617780 – SFB 1464 TerraQ - Relativistic and Quantum-based Geodesy.

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Publication: Heine, Nina, et al. "A transportable quantum gravimeter employing delta-kick collimated Bose–Einstein condensates." The European Physical Journal D 74.8 (2020): 1-8.

Presenters

  • Nina Heine

    • Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany

Authors

  • Nina Heine

    • Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany

  • Waldemar Herr

    • Institut für Satellitengeodäsie und Inertialsensorik, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Hannover, Germany
    • Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Institut für Satellitengeodäsie und Intertialsensorik, c/o Leibniz Universität Hannover, DLR-SI

  • Ludger Timmen

    • Institut für Erdmessung, Leibniz Universität Hannover, Hannover, Germany

  • Jürgen Müller

    • Institut für Erdmessung, Leibniz Universität Hannover, Hannover, Germany

  • Ernst M Rasel

    • Leibniz University Hannover
    • Gottfried Wilhelm Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, 30167 Hannover, Germany
    • Leibniz University Hannover, Institute of Quantum Optics, Hannover, Germany
    • Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany
    • Univ Hannover
    • Leibniz Universität Hannover, Institut für Quantenoptik