Cold atoms

Cold atoms


Cold atoms

Atome froids-2

Wave propagation in diffusive media is an important subject for numerous fields (medical imaging, acoustics, seismology, stellar physics, …). The experiments that we pursue make use of an original medium: a laser-cooled atomic cloud. The peculiar properties of this diffusive medium (strong resonances, strong nonlinearity, quantum internal structure of the scatterers, mechanical effects of light on the atoms, quantum effects…) give rise to a very rich physics. We study several subjects in this context.
More generally, we are interested in collective effects in light-atom interaction, which include multiple scattering of light but also nonlinear optics or cooperative scattering.
We have also studied dynamics of matter waves with a Bose-Einstein condensation experiment.
Finally, we have been involved in a fruitful collaboration with astrophysicists on the measurement of light correlations (Hanbury Brown and Twiss technique).
Our work is mainly experimental, using three cold-atom apparatus and several smaller hot-vapor setups, but also theoretical, in particular through many collaborations.

See team website