Towards a space-borne quantum gravity gradiometer: progress in laboratory demonstration

Recent progress in atom interferometry has lead to a new way to map and monitor the Earth gravity field. Atom interferometer-based instruments may significantly contribute to the understanding of the solid earth, ice and oceans, and dynamic processes in a comprehensive model of our planet. We are funded under the Advanced Technology Component program to develop this technology for a possible flight-based gravity gravimeter. The first step of the development is a demonstration of a laboratory-based gradiometer employing component technologies suitable for a future flight instrument. This paper describes the working principles and technical benefits of atom-wave interferometer-based inertial sensors, and gives a progress report on the development of a quantum gravity gradiometer for space applications at JPL.