Results 31 to 40 of about 1,088 (220)
Brane cosmology and the self-tuning of the cosmological constant in the presence of bulk black holes
European Physical Journal C: Particles and Fields, 2020 Motivated by the holographic self-tuning proposal of the cosmological constant, we generalize and study the cosmology of brane-worlds embedded in a higher-dimensional bulk black hole geometry. We describe the equations and matching conditions in the case
P. Betzios, O. Papadoulaki
doaj +1 more source
Constant-roll inflation in brane induced gravity cosmology
European Physical Journal C: Particles and Fields, 2022 In this article we study a constant-roll inflationary model in the context of the DGP brane-world cosmology caused by a quintessence scalar field. We determine an analytical solution for the Friedman equation coupled to the equation of motion of the ...
A. Ravanpak, G. F. Fadakar
doaj +1 more source
Cosmology in a brane-universe [PDF]
Astrophysics and Space Science, 2003 This contribution presents the cosmological models with extra dimensions that have been recently elaborated, which assume that ordinary matter is confined on a surface, called brane, embedded in a higher dimensional spacetime.
openaire +4 more sources
Bottom-up holographic models for cosmology
Journal of High Energy Physics, 2022 In this note, we investigate some simple generalizations of a bottom-up holographic approach to cosmology introduced in arXiv:1810.10601 . Our models utilize the Karch/Randall/Takayanagi ansatz for the gravitational dual of a boundary conformal field ...
Chris Waddell
doaj +1 more source
Cosmology of the brane world [PDF]
Physical Review D, 2000 We develop a possible cosmology for a Universe with n additional spatial dimensions of variable scale, and an associated scalar field, the radion, which is distinct from the field responsible for inflation, the inflaton. Based on a particular ansatz for the effective potential for the inflaton and radion (which may emerge in string theory), we show ...
Flanagan, Eanna E. +2 more
openaire +4 more sources
Minimal Length Scale Scenarios for Quantum Gravity [PDF]
Living Reviews in Relativity, 2013 Sabine Hossenfelder
exaly +2 more sources
Cosmology of brane universes and brane gases
, 2017 Nous étudions le comportement dynamique et perturbateur de certains modèles cosmologiques inspirés par la théorie des cordes. Celle-ci est une théorie de la gravité quantique qui est fort probablement nécessaire pour comprendre l'origine de notre univers.
Timon Boehm
openalex +4 more sources
The Ninth Marcel Grossmann Meeting, 2000 A brane universe derived from the Randall-Sundrum models is considered in which an additional Misner-like periodicity is introduced in the extra direction. This model solves the ambiguity in the choice of the brane world by identifying the branes with opposite tensions, in such a way that if one enters the brane with positive tension, one finds oneself
openaire +7 more sources