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Logo: Sonderforschungsbereich geo-Q
Logo Leibniz Universität Hannover
Logo: Sonderforschungsbereich geo-Q
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Research Area A: Frontiers of quantum sensors

Research Area A: Frontiers of quantum sensors

In Research Area A new instruments and sensors will be designed and developed.

We will investigate laser interferometry, the ultimate approach for length measurement available to us in the foreseeable future. Laser interferometric distance and acceleration measurements between freely falling test masses are expected to play a key role in future geodesy in space and, possibly, on ground. A first step in this direction is the GRACE Follow-On (GRACE-FO) satellite mission scheduled for launch in 2017, which includes an experimental laser interferomter (LRI) designed by members of geo-Q. But it is widely expected that many future satellite missions will be using laser interferometry for measuring the gravitational potential and its lower few gradients through the motion of multiple test masses in many degrees of freedom.We will develop atomic gravity sensors, both in compact, transportable and in large-scale stationary configurations. Transportable devices will allow observing temporal gravity and mass change with regional campaigns. Large-scale devices such as a new 10 m atom fountain will enable experimental gravimetry with very high sensitivity.We will investigate optical clocks and fibers to build up clock networks that have the potential to revolutionize gravimetry. By using the relativistic gravitational redshift for clock comparisons, we will open the field of relativistic geodesy to practical applications.