Observations exploring the contemporary cosmic acceleration have sparked interest in dark energy models possessing equations of state with w < −1. We review how the cosmic expansion history of a Dvali–Gabadadze–Porrati (DGP) braneworld model with a standard brane cosmological constant can mimic that of ordinary 4–dimensional gravity with w < −1 “phantom” dark energy for observationally relevant...

In this paper, we show that the holographic dark energy density hides in solutions of Lovelock gravity for black holes. Using obtained mass and temperature find equations. We propose a physical interpretation rescaled couplings as topological describes branch. addition to this, present new satisfy conditions according coupling horizon curvatures. This work can be extended equation state {\omega...

Here, creation of the universe is obtained out of gravity only. The dy-namical universe begins with two basic ingredients (i)vacuum energy, also called dark energy (as vacuum energy is not observed) and (ii) background radiation. These two are obtained through one-loop renormalization of ric-cion. In the proposed cosmology, it is found that not only current universe expands with acceleration, b...

The mystery of dark energy suggests that there is new gravitational physics on long length scales. Yet light degrees of freedom in gravity are strictly limited by Solar System observations. We can resolve this apparent contradiction by adding a Galilean-invariant scalar field to gravity. Called Galileons, these scalars have strong self-interactions near overdensities, like the Solar System, tha...