Einstein's General Relativity (GR) is possibly one of the greatest intellectual achievements
ever conceived by the human mind. In fact, over the last century, GR has proven to be an …

Recent cosmological observations have posed a challenge for traditional theories of gravity:
what is the force driving the accelerated expansion of the universe? What if dark energy or …

In this contribution, motivated by the quest to understand cosmic acceleration, based on the
theory of Hořava–Lifshitz and on the branch-cut gravitation, we investigate the effects of non …

Modified gravity theories have the potential of explaining the recent acceleration of the
Universe without resorting to the mysterious concept of dark energy. In particular, it has been …

With an explicit example, we show that Jordan frame and the conformally transformed
Einstein frames clearly lead to different physics for a non-minimally coupled theory of gravity …

We investigate the quantum cosmology of a closed spatially homogeneous and isotropic
Friedmann–Lemaître–Robertson–Walker (FLRW) minisuperspace model with …

Using a one-dimensional minisuperspace model with a dimensionless ratio E E_ Pl EEP l,
we study the initial singularity problem at the quantum level for the closed rainbow …

We review pedagogically some of the basic essentials regarding recent results intertwining
boundary conditions, the algebra of constraints and hidden symmetries in quantum …

In an open Friedmann-Robertson-Walker (FRW) space background, we study the classical
and quantum cosmological models in the framework of the recently proposed nonlinear …

“Like revealing all details of a coastal area merely through an holiday postcard”, a friend
once commented on what quantum cosmology (QC) seemed. Properly identified detailed …