We review applications of string theory to cosmology, from primordial times to the present-
day accelerated expansion. Starting with a brief overview of cosmology and string …

Over recent decades, the role of torsion in gravity has been extensively investigated along
the main direction of bringing gravity closer to its gauge formulation and incorporating spin …

We review the status of bouncing cosmologies as alternatives to cosmological inflation for
providing a description of the very early universe, and a source for the cosmological …

The past two decades have seen transformative advances in cosmology and string theory.
Observations of the cosmic microwave background have revealed strong evidence for …

In this review we present a thoroughly comprehensive survey of recent work on modified
theories of gravity and their cosmological consequences. Amongst other things, we cover …

Abstract Models of dark energy are conveniently characterized by the equation-of-state
parameter w= p/ρ, where ρ is the energy density and p is the pressure. Imposing the …

This article describes the various experimental bounds on the variation of the fundamental
constants of nature. After a discussion of the role of fundamental constants, their definition …

We show that the f (T) gravitational paradigm, in which gravity is described by an arbitrary
function of the torsion scalar, can provide a mechanism for realizing bouncing cosmologies …

We review the general features of nonsingular universes (ie those that go from an era of
accelerated collapse to an expanding era without displaying a singularity) as well as cyclic …

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 …