Testing the domain wall dominated scenario for the evolution of the large scale structure of the universe

A network of domain walls would accelerate the expansion of the universe, but it would also exert a repulsive force expected to help the formation of large-scale structures. We used three-dimensional (3D) N-body simulations of the dynamical evolution of the formation of the structure under the assumption of various configurations of the domain wall network and obtained some cosmological observables: the cosmic Mach number, the velocity distribution, and the two-point correlation. We conclude by comparing the simulation-derived values with values derived from observational data that an era of the domain wall dominated universe can exist. Recent observations of distant Type Ia supernovae 1) suggest that the expansion of the universe is accelerating. Some exotic form of the energy density is required for this accelerated expansion of the universe. More specifically, an equation of state for such energy density is α ≡ p/ρ < 0 with pressure p and energy density ρ, and thi