Short presentation

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, in cold or hot vapors.
We have been also involved in a fruitful collaboration with astrophysicists on revival of intensity interferometry (Hanbury Brown and Twiss technique). 
Our work is mainly experimental, using four cold-atom apparatus and several smaller hot-vapor setups, but also theoretical, in particular through many collaborations.

Please look at our Research page to know more.

News & events

March 2022: William and Mathilde at Paranal (Chile)!

The Dream Team
The Dream Team
In the framework of the I2C project, William and Mathilde had the chance to go to Chile for a six-night observing session on the Very Large Telescope facility at Mont Paranal in the Atacama desert. With our collaborator Jean-Pierre Rivet (OCA) we managed to adapt our setup to the 1.7 m telescopes and to observe the intensity correlations in the light of three different stars.
 

March 2022: Congratulations Ana!

On March 7th, Ana Cipris successfully defended her PhD thesis entitled "Long-lived collective modes of light in cold atoms: experimental and numerical studies on subradiance and Anderson localization". The committee manifested its great interest by asking high-level questions for 2h! Ana will soon start a post-doc in Zagreb. Good luck for the following of your career!

 

Fev. 2022: Welcome to Hodei Eneriz and welcome back to Romain Bachelard

After graduating from the University of Bordeaux, Hodei is joining us as a post-doc. He's going to work on Rb1 with Martial, Pierre and Mathilde. Romain is a long-time collaborator and he's going to be with us as invited researcher for one year. Welcome to both of you!

Jan. 2022: Two open postdoc positions

We have two open postdoc positions, for the Ytterbium and the Rubidium 2 experiments. See the announcement.

Nov. 2021: We're organizing the annual workshop of the "GDR Atomes froids"

This is an on-line event called "Cold-atom On-Line Meeting" (CoOLMe 2021) and it takes place from November 17th to 19th. See the dedicated website.

29 Sept. 2021: Pierre Azam successfully defended his PhD thesis!

Pierre's work on "Quantum fluids of light in hot atomic vapors" has been greatly appreciated by the committee. Pierre will remain in our group for some more time on an engineering project to make his experiment more compact, robust and automated, in view of future applications.

Sept. 2021: CoScaLi workshop at Porquerolles

Mathilde and Robin, with Romain Bachelard, have organized the 2021 workshop on Collective Scattering of Light (CoScaLi) on the beautiful island of Porquerolles. This hybrid event (both on-line and in-person) has been a success!

Sept. 2021: Our web page is back!

After several months of interruption and a lot of data loss (due to the fire of the data center), our cold-atom web page is finally back and can be updated again. But this is still a work in progress...