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Hannover 2016 – scientific programme

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A: Fachverband Atomphysik

A 32: Ultra-cold atoms, ions and BEC III (with Q)

A 32.8: Talk

Thursday, March 3, 2016, 12:45–13:00, f107

Satellite-borne quantum test of the weak equivalence principle — •Naceur Gaaloul, Christian Schubert, Sina Loriani, Wolfgang Ertmer, and Ernst Maria Rasel — Leibniz University of Hanover, Germany

The high sensitivity of atom interferometer sensors makes it a promising tool for performing tests of fundamental theories. One timely challenge is to experimentally bound an eventual violation of the weak equivalence principle (WEP), a corner stone of General Relativity, by tracking the trajectories of two different atomic species in free fall. When operating on a satellite, the interferometry time of few seconds would allow to target an inaccuracy of 1015 in differential acceleration between two atomic ensembles of different masses. In this presentation, we present the principle of such a measurement based on the use of a degenerate mixture of potassium and rubidium atoms. Several experimental arrangements have to be made in order to tackle a space operation and mitigate for significant systematic effects. This concept is proposed as a medium-size mission in the frame of the Cosmic Vision program of the European Space Agency.

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