Cosmological evolution with negative energy densities

Understand

For general number of spatial dimensions we investigate the cosmological dynamics driven by a cosmological constant and by a source with barotropic equation of state.

• It is assumed that for both those sources the energy density can be either positive or negative.
• Exact solutions of the cosmological equations are provided for flat models.
• For models with curved space and with zero cosmological constant the general solutions are expressed in terms of the hypergeometric function.