Holes in the walls: Primordial black holes as a solution to the cosmological domain wall problem

@article{Stojkovic2005HolesIT,
  title={Holes in the walls: Primordial black holes as a solution to the cosmological domain wall problem},
  author={Dejan Stojkovic and Katherine Freese and Glenn D Starkman},
  journal={Physical Review D},
  year={2005},
  volume={72},
  pages={045012}
}
We propose a scenario in which the cosmological domain wall and monopole problems are solved without any fine tuning of the initial conditions or parameters in the Lagrangian of an underlying filed theory. In this scenario domain walls sweep out (unwind) the monopoles from the early universe, then the fast primordial black holes perforate the domain walls, change their topology and destroy them. We find further that the (old vacuum) energy density released from the domain walls could alleviate… 

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