Home > Scientific teams > Atom Interferometry and Inertial Sensors > Research topics > Trapped atom interferometers
Trapped atom interferometers
9 October 2022
The use of atoms confined in a trap or in a guide allows in principle to increase drastically the interrogation time (to more than 1 s) keeping a compact apparatus. This also enables to develop new concepts of interferometers. The two important aspects in such developments are the study of the interaction with the trap and the choice of the most adapted architecture as a function of the measured quantity. Two technologies are especially adapted: laser traps (dipole traps) and atomic chips (micro-lithographic circuit) using magnetic traps. These two methods can provide the high confinement mandatory to achieve monomode structures and fast modulation of the trap potentials.
|
The FORCA-G project aims at measuring the interaction between an atom and a surface at short distances, using atom interferometry technics. This experiment will test the laws of gravity at short distance, looking for a possible deviation to Newtonian gravity. Such a deviation would be linked to new gravitational interactions with short scaling range, predicted by modern unification theories. Precise measurement of short range interactions could thus allow to observe for the first time an experimental signature of new physics beyond the standard model. |
The experiment of gyroscope on chip aims at developing new types of interferometer with guided atoms. Atoms are confined in 2D by the atom chip but free along the direction of the guide. This configuration is similar to the one of optical fibre interferometers. |
|
|
The experiment BIARO, Bose-Einstein condensation and atomic interferometry in a high finesse optical resonator, uses a compact setup for trapping and coherent manipulation of atoms in a high finesse optical cavity. The project aims at developing new kinds of atom interferometers and new detection schemes, beyond the standard limit. It is a collaboration with the LP2N of the Institut d’Optique d’Aquitaine (Philippe Bouyer) and started thanks to the support of IFRAF (Institut Francilien pour la Recherche sur les Atomes Froids). For more informations, please contact A. Landragin. |