50 citations · 159 across the 9 of their papers we have counts for
7 papers · 1 filter
A varying Dark Energy effective speed of sound parameter in the phantom Universe
Imanol Albarran, Mariam Bouhmadi-López, João Marto
We analyse the phenomenological effects of a varying Dark Energy (DE) effective speed of sound parameter, , on the cosmological perturbations of three phantom…
Eddington-inspired-Born-Infeld tensorial instabilities neutralized in a quantum approach
Imanol Albarran, Mariam Bouhmadi-López, Che-Yu Chen +1
The recent direct detection of gravitational waves has highlighted the huge importance of the tensorial modes in any extended gravitational theory. One of the most appealing approa…
Quantum cosmology of Eddington-Born-Infeld gravity fed by a scalar field: the big rip case
Imanol Albarran, Mariam Bouhmadi-López, Che-Yu Chen +1
We study the quantum avoidance of the big rip singularity in the Eddington-inspired-Born-Infeld (EiBI) phantom model. Instead of considering a simple phantom dark energy component,…
What if gravity becomes really repulsive in the future?
Imanol Albarran, Mariam Bouhmadi-López, João Morais
The current acceleration of the Universe is one of the most puzzling issues in theoretical physics nowadays. We are far from giving an answer on this letter to its true nature. Yet…
Doomsdays in a modified theory of gravity: A classical and a quantum approach
Imanol Albarran, Mariam Bouhmadi-López, Che-Yu Chen +1
By far cosmology is one of the most exciting subject to study, even more so with the current bulk of observations we have at hand. These observations might indicate different kinds…
Classical and quantum cosmology of the little rip abrupt event
Imanol Albarran, Mariam Bouhmadi-López, Claus Kiefer +2
We analyze from a classical and quantum point of view the behavior of the universe close to a little rip, which can be interpreted as a big rip sent towards the infinite future. Li…
Quantisation of the holographic Ricci dark energy model
Imanol Albarran, Mariam Bouhmadi-López
While general relativity is an extremely robust theory to describe the gravitational interaction in our Universe, it is expected to fail close to singularities like the cosmologica…