mai 24

I will present  a study of  gravitational collapse in  confined spaces employing the simplest two-body setting: a system composed of two thin shells  in  spherical  symmetry.  This  double-shell  model   exhibits critical behavior and chaotic dynamics, both of which are  reminiscent of  the turbulent  instability of  anti-de Sitter  spacetime recently observed  in  the evolution  of  massless scalar  fields.  The problem amounts to solving just two decoupled ODEs but it captures highly  non-trivial  dynamics: depending  on initial  data, one  observes prompt collapse,   p