  This is the contribution to Quarks'2018 conference proceedings. This
contribution is devoted to the holographic description of chaos and quantum
complexity in the strongly interacting systems out of equilibrium. In the first
part of the talk we present different holographic complexity proposals in
out-of-equilibrium CFT following the local perturbation. The second part is
devoted to the chaotic growth of the local operator size at a finite chemical
potential. There are numerous results stating that the chemical potential may
lead to the chaos disappearance, and we confirm these results from holographic
viewpoint.
