Induced gravity on intersecting brane worlds. II. Cosmology

  title={Induced gravity on intersecting brane worlds. II. Cosmology},
  author={Olindo Corradini and Kazuya Koyama and Gianmassimo Tasinato},
  journal={Physical Review D},
We explore cosmology of intersecting brane worlds with induced gravity on the branes. We find the cosmological equations that control the evolution of a moving codimension-one brane and a codimension-two brane that sits at the intersection. We study the Friedmann equation at the intersection, finding new contributions from the six-dimensional bulk. These higher dimensional contributions allow us to find new examples of self-accelerating configurations for the codimension-two brane at the… 

Perturbations of nested branes with induced gravity

We study the behaviour of weak gravitational fields in models where a 4D brane is embedded inside a 5D brane equipped with induced gravity, which in turn is embedded in a 6D spacetime. We consider a

Smooth tensionful higher-codimensional brane worlds with bulk and brane form fields

  • Olindo Corradini
  • Physics
  • 2010
Completely regular tensionful codimension-n brane world solutions are discussed, where the core of the brane is chosen to be a thin codimension-(n − 1) shell in an infinite volume flat bulk, and an

Codimension-2 black hole solutions on a thin 3-brane and their extension into the bulk

In this talk we discuss black hole solutions in six-dimensional gravity with a Gauss-Bonnet term in the bulk and an induced gravity term on a thin 3-brane of codimension-2. It is shown that these

Self-properties of codimension-2 braneworlds

We consider four-dimensional de Sitter, flat and anti de Sitter branes embedded in a six-dimensional bulk spacetime whose dynamics is dictated by Lovelock theory. We find, applying a generalised

The consistency of codimension-2 braneworlds and their cosmology

We study axially symmetric codimension-2 cosmology for a distributional braneworld fueled by a localised four-dimensional perfect fluid, in a six-dimensional Lovelock theory. We argue that only the

Cascading Cosmology

We develop a fully covariant, well-posed 5D effective action for the 6D cascading gravity braneworld model, and use this to study cosmological solutions. We obtain this effective action through the

Physics of Strings and Extra Dimensions

The purpose of this thesis is twofold and motivated by recent developments in string theory and extra dimensional models. The first objective is to describe the development and progress in the

Cascading gravity is ghost free

We perform a full perturbative stability analysis of the 6D cascading gravity model in the presence of 3-brane tension. We demonstrate that for sufficiently large tension on the (flat) 3-brane, there

Strong Coupling Holography

We show that whenever a 4-dimensional theory with N particle species emerges as a consistent low energy description of a 3-brane embedded in an asymptotically-flat (4+d)-dimensional space, the



Induced gravity on intersecting branes

We establish Einstein-Hilbert gravity couplings in the effective action for Intersecting Brane Worlds. The four-dimensional induced Planck mass is determined by calculating graviton scattering

New angle on intersecting branes in infinite extra dimensions

I construct solutions to Einstein's equations in 6 dimensions with a bulk cosmological constant and intersecting 4-branes. Solutions exist for a continuous range of 4-brane tension, with long

Higher codimension braneworlds from intersecting branes

We study the matching conditions of intersecting brane worlds in Lovelock gravity in arbitrary dimension. We show that intersecting various codimension 1 and/or codimension 2 branes one can find

A brane–bulk matter relation for a purely conical codimension-2 brane world

We study gravity on an infinitely thin codimension-2 brane world, with purely conical singularities and in the presence of an induced gravity term on the brane. We show that in this approximation,

Standard 4d gravity on a brane in six dimensional flux compactifications

We consider a six-dimensional space-time, in which two of the dimensions are compactified by a flux. Matter can be localized on a codimension one brane coupled to the bulk gauge field and wrapped

Cosmology of intersecting brane-world models in Gauss–Bonnet gravity

We study the cosmological properties of a codimension two brane world that sits at the intersection between two four-branes, in the framework of six-dimensional Einstein–Gauss–Bonnet gravity. Due to

Gravity on a brane in infinite volume extra space

We generalize the mechanism proposed in a previous paper and show that a four-dimensional relativistic tensor theory of gravitation can be obtained on a delta-function brane in flat infinite-volume

Brane-induced gravity in more than one extra dimension: Violation of equivalence principle and ghost

We consider a brane-induced gravity model in more than one extra dimension, regularized by assuming that the bulk gravity is soft in the ultraviolet. We study linear theory about a flat