Buscar
Mostrando ítems 1-10 de 25
Scalar fluctuations of the scalar metric during inflation from a non-perturbative 5D large-scale repulsive gravity model
(Springer, 2013-10-16)
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 calculations valid on large cosmological ...
Gauge invariant fluctuations of the metric during inflation from a new scalar-tensor Weyl-integrable gravity model
(American Physical Society, 2016-09)
We investigate gauge invariant scalar fluctuations of the metric during inflation in a nonperturbative formalism in the framework of a recently formulated scalar-tensor theory of gravity, in which the geometry of space-time ...
Exact solutions for the fluctuations in flat FRW universe coupled to a scalar fields
(Springer/plenum Publishers, 2006-12)
Some exact solutions for the small-first-order perturbations of an FRW metric minimally coupled to a neutral massive scalar field are presented.
Weyl geometry, anti-de Sitter space, and Φ4-theory
(Springer Heidelberg, 2016-05)
We study the Gaussian approximation to the quantum fluctuations of the metric of the fourdimensional anti-de Sitter spacetime. The associated massless scalar field has a quartic self-interaction, for which we construct the ...
Scalar fluctuations of the scalar metric during inflation from a non-perturbative 5D large-scale repulsive gravity model
(2013)
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 calculations valid on large cosmological scales, ...
Scalar fluctuations of the scalar metric during inflation from a non-perturbative 5D large-scale repulsive gravity model
(2013)
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 calculations valid on large cosmological scales, ...
Cosmological Fluctuations in Delta Gravity
(2023)
About 70% of the Universe is Dark Energy, but the physics community still does not know what it is. Delta gravity (DG) is an alternative theory of gravitation that could solve this cosmological problem. Previously, we ...
On the effects of the modification of the metric in the gravitational context
(2020)
This thesis consists of two parts: In the first one, simple generic extensions of isotropic Durgapal–Fuloria stars to the anisotropic domain were presented. These anisotropic solutions were obtained by guided minimal ...
Scalar fluctuations of the scalar metric during inflation from a non-perturbative 5D large-scale repulsive gravity model
(1992)
The purpose of this study was to compare the safety and efficacy of lomefloxacin with that of cefaclor in the treatment of adult secondary bacterial skin and skin structure infections. The study was conducted as a randomized, ...
Determinación numérica del espectro de fluctuaciones escalares de paredes de dominio
(Escuela Superior Politécnica de Chimborazo, 2020-11-04)
The present work aimed to calculate the scalar fluctuations on a 4-dimensional static domain wall embedded in a 5-dimensional space-time in coordinates according to begin with, the double wall solution to the Scalar Field ...