Results 121 to 130 of about 18,708 (249)

Brane cosmological perturbations [PDF]

Physical Review D, 2000
We address the question of cosmological perturbations in the context of brane cosmology, where our Universe is a three-brane where matter is confined, whereas gravity lives in a higher dimensional spacetime. The equations governing the bulk perturbations are computed in the case of a general warped universe. The results are then specialized to the case
openaire   +2 more sources

Brane-world and loop cosmology from a gravity–matter coupling perspective

Physics Letters B, 2015
We show that the effective brane-world and the loop quantum cosmology background expansion histories can be reproduced from a modified gravity perspective in terms of an f(R) gravity action plus a g(R) term non-minimally coupled with the matter ...
Gonzalo J. Olmo, D. Rubiera-Garcia
doaj   +1 more source

AdSS_5 Brane World Cosmology

, 2004
The gravitational equations of the 5-dimensional analogue of the AdSS space-time, where all the matter fields are confined on the 3-brane are examined.
D. Ida, Denis Gonta, L. Anchordoqui, N. Deruelle, N.S. Deger, O. Klein, P. Bowcock, P. Kraus, S. Nojiri, S. Shankaranarayanan, S.W. Hawking, S.W. Hawking, T. Kaluza, T. Shiromizu, W. Israel   +14 more
core   +2 more sources

Friedmann cosmology on codimension 2 brane with time dependent tension

, 2005
A solution of codimension 2 brane is found for which 4 dimensional Friedmann cosmology is recovered on the brane with time dependent tension, in the Einstein frame.
HONGSHENG ZHANG, Navarro I., Navarro I., QI GUO, RONG-GEN CAI   +4 more
core   +1 more source

Living on the edge: cosmology on the boundary of anti-de Sitter space [PDF]

, 2000
We sketch a particularly simple and compelling version of D-brane cosmology. Inspired by the semi-phenomenological Randall--Sundrum models, and their cosmological generalizations, we develop a variant that contains a single (3+1)-dimensional D-brane ...
Carlos Barcelo, Matt Visser, Morris, Randall, Randall, Sen, Visser, Visser, Visser   +8 more
core   +5 more sources

Generalized approach for the perturbative dynamical braneworld in D dimensions

European Physical Journal C: Particles and Fields
In this paper, we propose an approach to derive the brane cosmology in the D-dimensional braneworld model. We generalize the “bulk-based” approach by treating the 4-brane as a small perturbation to the D-dimensional spherically symmetric spacetime.
Zi-Chao Lin, Hao Yu, Yungui Gong
doaj   +1 more source

Gauss-Bonnet Braneworld Cosmology with Modified Induced Gravity on the Brane

Advances in High Energy Physics, 2013
We analyze the background cosmology for an extension of the DGP gravity with Gauss-Bonnet term in the bulk and f(R) gravity on the brane. We investigate implications of this setup on the late-time cosmic history.
Kourosh Nozari, Faeze Kiani, Narges Rashidi   +2 more
doaj   +1 more source

Black hole microstate cosmology

Journal of High Energy Physics, 2019
In this note, we explore the possibility that certain high-energy holographic CFT states correspond to black hole microstates with a geometrical behind-the-horizon region, modelled by a portion of a second asymptotic region terminating at an end-of-the ...
Sean Cooper, Moshe Rozali, Brian Swingle, Mark Van Raamsdonk, Christopher Waddell, David Wakeham   +5 more
doaj   +1 more source

Dilaton Stabilization in Brane Gas Cosmology

, 2004
Brane Gas Cosmology is an M-theory motivated attempt to reconcile aspects of the standard cosmology based on Einstein's theory of general relativity.
A. BERNDSEN, J. CLINE, Watson S., Watson S.   +3 more
core   +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   +2 more sources