ERC project: Anderson Localization Light in Cold Atoms (ANDLICA)

The goal of this project is to use large clouds of cold ytterbium atoms to observe Anderson localization of light in three dimensions, which has challenged theoreticians and experimentalists for many decades.

After the prediction by Anderson of a disorder-induced conductor to insulator transition for electrons, light has been proposed as ideal non interacting waves to explore coherent transport properties in the absence of interactions. The development in experiments and theory over the past several years have shown a route towards the experimental realization of this phase transition.

Previous studies on Anderson localization of light using semiconductor powders or dielectric particles have shown that intrinsic material properties, such as absorption or inelastic scattering of light, need to be taken into account in the interpretation of experimental signatures of Anderson localization. Laser-cooled clouds of atoms avoid the problems of samples used so far to study Anderson localization of light. Ab initio theoretical models, available for cold ytterbium atoms, have shown that the mere high spatial density of the scattering sample is not sufficient to allow for Anderson localization of photons in three dimensions, but that an additional magnetic field or additional disorder on the level shifts can induce a phase transition in three dimensions.

The role of disorder in atom-light interactions has important consequences for the next generation of high precision atomic clocks and quantum memories. By connecting the mesoscopic physics approach to quantum optics and cooperative scattering, this project will allow better control of cold atoms as building blocks of future quantum technologies. Time-resolved transport experiments will connect super- and subradiant assisted transmission with the extended and localized eigenstates of the system.

Short video describing the project (in French):


News & events

May 2022: Welcome to Apoorva

Apoorva is starting her PhD thesis in our team. She's going to contribute to the experimental work. Before that she did her Master at the Indian Institute of Technology Delhi (India).

At about the same time, Nahum left to go back to Mexico.

Good luck to both of you!


October 2021: Welcome to Nahum Calderón Chávez

Nahum is starting a post-doc in our team. He's going to work on theoretical and numerical aspects of the project. Before that he did his PhD in Puebla (Mexico) and a first post-doc in Bescia (Italy).

Oct. 2021: The ANDLICA webpage is back!

After several months of interruption and the complete loss of data (due to the fire of the data center), the ANDLICA webpage is finally back. But this is still a work in progress...



  • Robin Kaiser (PI)
  • Apoorva (PhD student)
  • Hector Letellier (PhD student)
  • Álvero de Melo (PhD student)

    Alumni : Nahum Chávez (Post-doc, 2021-2022), Anaïs Dorme (Master, 2021)


Experimental work: Construction on a new cold-atom apparatus using ytterbium

Yb team
Yb team

Experimental work began during summer 2019 with purchasing equipment and turning an old unused room into an optical lab.

We now (October 2021) have two tables full of lasers and optical devices, a vacuum chamber, and laser-cooled ytterbium atoms inside! We obtained our first magneto-optical trap (on the blue transition) in spring 2021.


Theoretical work: Towards Anderson localization of light in cold atoms

We have investigated the existence and the conditions of the observability of Anderson localization of light in cold atoms. This work is mainly collaborative, with the groups of Eric Akkermans (Technion, Israel), Luca Celardo (Brescia, then Mexico, now Florence, Italy) and Romain Bachelard (São Carlos, Brazil).