77 citations · 501 across the 21 of their papers we have counts for
14 papers · 1 filter
On Geometric Cosmology
Gustavo Arciniega, Luisa G. Jaime, Susana J. Landau +1
We present a modification to General Relativity by making a redefinition of the coupling constant in front of the Ricci curvature scalar along with the Generalized Quasi-topologica…
A unified geometric description of the Universe: from inflation to late-time acceleration without an inflaton nor a cosmological constant
Luisa G. Jaime, Gustavo Arciniega
We present a cosmological model arising from a gravitational theory with an infinite tower of higher-order curvature invariants that can reproduce the entire evolution of the Unive…
On the viability of the evolution of the universe with Geometric Inflation
Luisa G. Jaime
We perform a general analysis of the cosmological viability of Geometric Inflation. We show that the evolution of the universe, from inflation to the present day, can be seen from…
Inflationary predictions of Geometric Inflation
Gustavo Arciniega, Luisa Jaime, Gabriella Piccinelli
In the framework of gravitational models obtained from the Geometric Inflation's proposal, where an infinite tower of curvature scalars are included into the action, we compute the…
Towards geometric inflation: the cubic case
Gustavo Arciniega, Jose D. Edelstein, Luisa G. Jaime
We present an up to cubic curvature correction to General Relativity with the following features: (i) its vacuum spectrum solely consists of a graviton and is ghost-free, (ii) it p…
Cosmic acceleration in asymptotically Ricci flat Universe
Luisa G. Jaime, Marcelo Salgado
We analyze the evolution of a Friedmann-Robertson-Walker spacetime within the framework of metric gravity using an exponential model. We show that gravity may lead to…
Lemaitre-Tolman-Bondi dust solutions in f(R) gravity
Roberto A Sussman, Luisa G Jaime
We derive a class of non-static inhomogeneous dust solutions in f(R) gravity described by the Lemaitre-Tolman-Bondi (LTB) metric. The field equations are fully integrated for all p…
Spherically symmetric black holes in gravity: Is geometric scalar hair supported ?
Pedro Cañate, Luisa G. Jaime, Marcelo Salgado
We discuss with a rather critical eye the current situation of black hole (BH) solutions in gravity and shed light about its geometrical and physical significance. We also a…
Diagnostic of under the function
Luisa G. Jaime
We perform the twopoint diagnostic for the function proposed by Sahni in 2014 for the Starobinsky and Hu & Sawicki models in gravity. We show that t…
Note on the equation of state of geometric dark-energy in f(R) gravity
Luisa G. Jaime, Leonardo Patiño, Marcelo Salgado
We focus on the analysis of three inequivalent equations of state of geometric dark energy in cosmology that have been considered in the past and discuss their differences,…
About matter and dark-energy domination eras in R^n gravity or lack thereof
Luisa G. Jaime, Leonardo Patiño, Marcelo Salgado
We provide further numerical evidence which shows that R^n models in f(R) metric gravity whether produces a late time acceleration in the Universe or a matter domination era (usual…
Cosmology in f(R) exponential gravity
Luisa Jaime, Marcelo Salgado, Leonardo Patino
Using an approach that treats the Ricci scalar itself as a degree of freedom, we analyze the cosmological evolution within an f(R) model that has been proposed recently (exponentia…
f(R) Cosmology revisited
Luisa G. Jaime, Leonardo Patino, Marcelo Salgado
We consider a class of metric f(R) modified gravity theories, analyze them in the context of a Friedmann-Robertson-Walker cosmology and confront the results with some of the known…
Robust approach to f(R) gravity
Luisa G. Jaime, Leonardo Patino, Marcelo Salgado
We consider metric f(R) theories of gravity without mapping them to their scalar-tensor counterpart, but using the Ricci scalar itself as an "extra" degree of freedom. This approac…