cold-atom inertial sensor without dead time
The cooling of atoms by laser has allowed a revolution in the field of quantum technologies. It has led, for example, to improve the performance of atomic clocks by several orders of magnitude, and is used to realize ultra-sensitive rotational and acceleration sensors. However, the measurements made on clouds of cold atoms are discontinuous: the cooling phase of the atoms represents a non-negligible duration of the experiment during which the measurement is interrupted. For an inertial sensor, this loss of information was, up to now, a limiting factor for many applications. A team of researchers from the LNE-SYRTE (Paris Observatory, PSL, CNRS, Sorbonne Universities) has demonstrated a method to overcome this technological limitation, with a brilliant idea of interlacing measurements and a delicate technical masters. Thanks to this work, the performances of the cold atom gyrometers have been improved by a factor of thirty, opening up new possibilities in geoscience and fundamental physics.
Author : Remi Geiger
For more info, here you find the :
The website of the group Interférométrie Atomique et Capteurs Inertiels du SYRTE.