Gravity sensing with very long baseline atom interferometry (A02)

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2014 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 239994235

Very Long Baseline Atom Interferometry (VLBAI) rises great promises for high-accuracy absolute gravimetry and gradiometry at geodetic observatories as well as for tests of fundamental physics. In these respects worldwide unique features are being developed for the VLBAI test stand at the Hannover Institut for Technology (HITec): With its 10m baseline backed by a state-of-the-art seismic attenuation system and a high-performance magnetic shield, the device puts uncertainties of 10-14 g and beyond in reach. We will harness the potential of large scale factor interferometers and will constrain limiting factors to an unprecedented level. This will allow one to reach the resolution of superconducting gravimeters with an absolute gravimeter.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1128: Relativistic Geodesy and Gravimetry with Quantum Sensors - Modelling, Geo-Metrology and Future Technology (geo-Q)
• Applicant Institution: Gottfried Wilhelm Leibniz Universität Hannover
• Project Heads: Professor Dr. Wolfgang Ertmer; Professor Dr. Ernst Maria Rasel; Dr. Dennis Schlippert