Buscar
Mostrando ítems 21-30 de 52
Mixmaster chaos
(Elsevier Science BvAmsterdamHolanda, 2001)
Numerical simulations of loop quantum Bianchi-I spacetimes
(IOP Publishing, 2017-04-10)
Due to the numerical complexities of studying evolution in an anisotropic quantum spacetime, in comparison to the isotropic models, the physics of loop quantized anisotropic models has remained largely unexplored. In ...
Analytic self-gravitating Skyrmions, cosmological bounces and AdS wormholes
(2016-01-10)
We present a self-gravitating, analytic and globally regular Skyrmion solution of the Einstein-Skyrme system with winding number w=±1, in presence of a cosmological constant. The static spacetime metric is the direct product ...
Distance-redshift relations in an anisotropic cosmological model
(Journal of Cosmology and Astroparticle Physics, 2013)
In this paper we study an anisotropic model generated from a particular Bianchi
type-III metric, which is a generalization of G¨odel’s metric and an exact solution of Einstein’s
field equations. We analyse type Ia supernova ...
Quantum cosmology for inflationary scenary
(Revista Mexicana de Física, 2009)
Aspects of loop quantization in cosmological models
(Universidad Michoacana de San Nicolás de Hidalgo, 2014-01)
As the first part, we consider the measure problem in standard slow-roll inationary models from the perspective of loop quantum cosmology (LQC). We study the probability of having enough e-foldings and focus on its dependence ...
Métrica Bianchi I em uma teoria com derivadas superiores e matéria relativística
(Universidade Federal de Juiz de Fora (UFJF)BrasilICE – Instituto de Ciências ExatasPrograma de Pós-graduação em FísicaUFJF, 2021)
Anisotropy and inflation in Bianchi I braneworlds
(IOP Publishing, 2004-12)
After a more general assumption on the influence of the bulk on the brane, we extend some conclusions by Maartens et al (2001 Phys. Rev. D 63 063509) and Santos et al (2001 Phys. Rev. D 64 063506) on the asymptotic behaviour ...
Observations on interfacing loop quantum gravity with cosmology
(American Physical Society, 2015-12)
A simple idea of relating the loop quantum gravity (LQG) and loop quantum cosmology (LQC) degrees of freedom is introduced and used to define a relatively robust interface between these theories in context of toroidal ...
Campo escalar como fuente de cosmologías no singulares
(Universidad Michoacana de San Nicolás de Hidalgo, 2010-10)
It is well known that the solutions to the equations of the standard cosmological model lead to a singularity. These solutions have given rise to the so-called ``Big Bang Theory'', which says that at the beginning of time, ...