Artin groups and quasi-isometric rigidity

Artin groups form a large family of groups that contains many other interesting families, such as free groups, free abelian groups, braid groups, etc. Despite a lot of effort, these groups remain quite mysterious in general. In this talk, I will explain how one can recover a lot of information about some Artin groups by looking at their actions on a fitting non-positively curved simplicial complex. In particular, I will present how one might recover from such an action various results of quasi-isometric rigidity for the group.