Long Range Interactions
These experiments allow for description of the interaction between atoms and molecules. We are interested in cold collisions of atoms as well as in binding properties of molecules since both aspects can be related closely by molecular potentials.
Our high precision spectroscopic experiments on particle beams enable us to determine these potentials from which we can deduce for example the scattering length with a higher resolution than in many other experiments. As the scattering length is of high importance for BEC experiments, our group has investigated methods to manipulate it in a desired way by magnetic or light fields.
Molecular spectroscopy was first done on homonuclear dimers like Na2 and K2, but mixed alkalies are studied as well.
Earth alkaline elements have recently gained great interest: see the pages on Sr2 and Ca2.