MG14 - Talk detail

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Atomic Interferometry (AI) has shown to be an extremely performing probe of inertial forces, and has revealed sensitivities to acceleration or rotation competing with or even beating state-of-the art sensors based on other technologies. The high stability and accuracy of AI sensors is at the basis of several applications ranging from fundamental physics to inertial navigation. In contrast with many experiments, which aim at making AI small and compact, large-scale matter-wave sensor open new applications. Increasing sensitivity for gravitation experiments relies on increasing the interferometer baseline, either by increasing the interferometer area or by performing differential measurements on a large scale. We will review the recent experimental results with free-fall dual species interferometer, where two atomic species, 39K and 87Rb, are used to verify that two massive bodies undergo the same gravitational acceleration regardless of their mass or composition. In another experiment, large-scale differential gravitational measurement is using an array of Atom Interferometers (AIs) configured to differentiate Newtonian Noise, geodetic signal and GW detection. With the foreseen cold atom technology developments in the next decade, strain sensitivities down to 10^-19 in the 0.1-10 Hz band are within reach, offering interesting complementary observations to optical GW detectors operating at higher frequencies.

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