After a decade and a half of research motivated by the accelerating universe, theory and
experiment have reached a certain level of maturity. The development of theoretical models …

We review in detail a number of approaches that have been adopted to try and explain the
remarkable observation of our accelerating universe. In particular we discuss the arguments …

We review the paradigm of quintom cosmology. This scenario is motivated by the
observational indications that the equation-of-state of dark energy across the cosmological …

The observable universe could be a 1+ 3-surface (the “brane”) embedded in a 1+ 3+ d-
dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the …

We reconstruct the equation of state w (z) of dark energy (DE) using a recently released data
set containing 172 Type Ia supernovae (SNe) without assuming the prior w (z)≥− 1 (in …

Recent developments in the physics of extra dimensions have opened up new avenues to
test such theories. We review cosmological aspects of brane world scenarios such as the …

The DGP brane-world model provides an alternative to the standard LCDM cosmology, in
which the late universe accelerates due to a modification of gravity rather than vacuum …

We study quasistatic perturbations in a cosmological background in the Dvali-Gabadadze-
Porrati braneworld model. We identify the Vainshtein radius at which the nonlinear …

We develop a scaling ansatz for the master equation in Dvali, Gabadadze, Porrati
cosmologies, which allows us to solve the equations of motion for perturbations off the brane …

We study the cosmology of the Randall-Sundrum brane-world where the Einstein-Hilbert
action is modified by curvature correction terms: a four-dimensional scalar curvature from …