Dynamical evolution of unstable self-gravitating scalar solitons
  Recently, static and spherically symmetric configurations of globally regular self-gravitating scalar solitons were found. These configurations are unstable with respect to radial linear perturbations. In this paper we study the dynamical evolution of such configurations and show that, depending on the sign of the initial perturbation, the solitons either collapse to a Schwarzschild black hole or else ``explode'' into an outward moving domain wall. 
Miguel Alcubierre, Jose A. Gonzalez and Marcelo Salgado