Ultracold Atom Gravimeter

Atom interferometry allows for the realisation of inertial sensors based on laser cooled atoms. Their limits in performances, both in terms of accuracy and stability, are linked to the temperature of the atomic cloud, in the low μK range, and more specifically, to the residual ballistic expansion of the atomic sources in the laser beams. To overcome these limits, we use as a source ultracold atoms in the nano-kelvin range in our absolute atom gravimeter.