Abstract
In this lecture, we continue our study of Fano-Feshbach resonances. Thanks to this remarkable tool, we can now use dilute quantum gases to approach the physics of strong interactions, with a scattering length that can reach, or even exceed, the distance between particles. In this lecture, we will first take a closer look at the predictions of this model, highlighting the important notion of resonance width and clarifying the contribution of the closed channel. We will then move on to describe more quantitative treatments of these resonances, ending with a presentation of some recent experiments. We'll look at the main tools available in the laboratory to characterize these resonances, and we'll see that they can have unexpected extensions, in connection with quantum chaos theory, for example.
