On the stage of strongly coupled systems in condensed matter, holography
is nowadays playing a very interesting part. Indeed it furnishes a
well-defined framework were strongly coupled toy-models amenable to
explicit quantitative computations are available. Universal behaviors,
such as linear in T resistivity of strange metals or Plankian diffusivity
bounds at criticality, can be directly addressed and even provide useful
suggestions to direct experimental investigations. I'll discuss some
exciting insight gained from holographic models featuring momentum
dissipation induced by an explicit mass term for the gravitons in the dual
gravity model
