We have several experimental setups where we study of the effects of strong dipole-dipole interactions in systems of a few atoms:

• In the Rydberg project (OMEDOQ), we use arrays of optical tweezers, each containing a single Rb atom, and we induce strong interactions between the atoms by exciting them to Rydberg states. We have basically full control over the system: geometry and size of the array, exact number of atoms, strength of the interaction… With this platform, we are currently exploring the physics of spin Hamiltonians (Ising, XY, t–J) with up to 600 particles.
  
• In the superradiant cloud project (Pheoniqs), we trap an adjustable number of Rb atoms (from 1 to 1000s) in microscopic dipole traps. We place ourselves in a regime where the optical response of the cloud features collective effects, due to the strong interaction between light-induced dipoles. We are interested in collective spontaneous emission, superradiance, subradiance, and driven-dissipative dynamics.
• The Dysprosium project is under construction. We plan on assembling arrays of Dy atoms. Using the combination of narrow and broad lines of Dy, we plan on studying ordered ensembles of two-level atoms interacting via light-mediated interactions.