On the stability of homogeneous black strings in AdS.

In this paper we extend the analysis of the stability of an homogeneous black string in the presence of a negative cosmological constant with minimally coupled scalar fields. We recall the linear stability of this solutions under generic perturbations on the metric and of the scalar fields. Then, we extend the study of the stability by presenting the existence of a non-generic perturbation which may lead to an unstable behavior. The later mode is fine-tuned since it requires the scalar field degree of freedom to be absent through the whole evolution of the system.