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6 papers · 2 filters
The primordial explosion of a false white hole from a 5D vacuum
José Edgar Madriz Aguilar, Claudia Moreno, Mauricio Bellini
We explore the cosmological consequences of some possible big bang produced by a black-hole with mass in an 5D extended SdS. Under these particular circumstances, the effective…
No compelling cosmological models come out of magnetic universes which are based in nonlinear electrodynamics
Ricardo Garcia-Salcedo, Tame Gonzalez, Israel Quiros
Here we investigate the cosmic dynamics of Friedmann-Robertson-Walker universes -- flat spatial sections -- which are driven by nonlinear electrodynamics (NLED) Lagrangians. We pay…
Comment on "Extended Born-Infeld theory and the bouncing magnetic universe"
Ricardo Garcia-Salcedo, Tame Gonzalez, Israel Quiros
In a recent paper [Phys. Rev. D{\bf 85}, 023528 (2012)] the authors proposed a generalized Born-Infeld electrodynamics coupled to general relativity which produces a nonsingular bo…
Scalar fluctuations of the scalar metric during inflation from a non-perturbative 5D large-scale repulsive gravity model
José Edgar Madriz Aguilar, Luz Marina Reyes, Claudia Moreno +1
We develop a non-perturbative formalism for scalar metric fluctuations from a 5D extended version of general relativity in vacuum. In this work we concentrate our efforts on calcul…
Bulk Viscous Matter-dominated Universes: Asymptotic Properties
Arturo Avelino, Ricardo Garcia-Salcedo, Tame Gonzalez +2
By means of a combined use of the type Ia supernovae and H(z) data tests, together with the study of the asymptotic properties in the equivalent phase space - through the use of th…
QCD ghost dark energy cannot (even roughly) explain the main features of the accepted cosmological paradigm
Ricardo Garcia-Salcedo, Tame Gonzalez, Israel Quiros +1
We explore the whole phase space of the so called Veneziano/QCD ghost dark energy models where the dynamics of the inner trapping horizon is ignored and also the more realistic mod…