Context: Inertial sensors with cold atoms offer many applications in fundamental physics (tests of the laws of gravitation, gravitational astronomy), geosciences (measurements of the gravity field or of Earth rotation) and inertial navigation. The operation of these sensors is based on atomic interferometry taking advantage of superpositions between quantum states of different momentum of an atom. These superposition states are obtained by means of optical transitions with two (or more) photons communicating momentum to the atom and acting as beam splitters and mirrors for the matter waves. SYRTE is a pioneer laboratory in the field, recognised worldwide for its expertise in the metrology of these quantum sensors, their use for different applications, and their technological transfer.

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