Abstract (EN):
We discuss necessary conditions for a network of cosmic domain walls to have a chance of providing
the dark energy that might explain the recent acceleration of the universe. We derive a strong
bound on the curvature of the walls, which shows that viable candidate networks must be finetuned
and non-standard. We also discuss various requirements that any stable lattice of frustrated
walls must obey. We conjecture that, even though one can build (by hand) lattices that would
be stable, no such lattices will ever come out of realistic domain wall forming cosmological phase
transitions. We provide some simple numerical simulations that illustrate our results and correct
some misconceptions in the published literature, but a detailed numerical analysis is left for a
companion paper.
Language:
Portuguese
Type (Professor's evaluation):
Scientific