Guillaume Brochier
Laboratoire Kastler Brossel - guillaume.brochier@lkb.upmc.frWe use hot Rb vapor as a non-linear Kerr medium to produce a repulsively interacting (self defocusing) beam inside the cell. Under the paraxial approximation, the electric field envelope’s propagation is analogous to the temporal evolution of a superfluid, described by the 2D Gross-Pitaevskii equation in the mean-field approximation. Using a second laser, we are able to tune finely a potential in the GPE equation. This opens new perspectives in our system, such as exploring the transition towards superfluidity.