Gravity in higher codimension de Sitter brane worlds
Loading...
Date
Authors
Olasagasti, I.
Tamvakis, K.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Type
Type of the conference item
Journal type
peer reviewed
Educational material type
Conference Name
Journal name
Physical Review D
Book name
Book series
Book edition
Alternative title / Subtitle
Description
We study solutions of Einstein's equations corresponding to codimension n>2 global topological defects with de Sitter slices. We analyze a class of solutions that are cylindrically symmetric and admit a positive, negative, or zero bulk cosmological constant. We derive the relevant graviton equations. For an extended brane, the properties of the solution depend on the appropriate boundary conditions that have to be satisfied by the exterior solutions near the core. As an alternative we consider matching copies of the exterior solution related by symmetry. We show that we can get localization only when the bulk cosmological constant is negative. We obtain a condition on the global defect symmetry breaking scale which ultimately controls the size of the n-1 internal dimensions at the position of the brane. The induced metric on the brane, in the case of mirror spacetimes, is a direct product of a de Sitter space and an (n-1)-sphere, while the metric of the embedding spacetime is a warped product and the actual size of the (n-1)-sphere changes as we move along the radial direction. The solutions possess naked singularities, which nevertheless satisfy no-flow conditions.
Description
Keywords
dimensions, millimeter, hierarchy, tev
Subject classification
Citation
Link
<Go to ISI>://000185830200047
http://prd.aps.org/abstract/PRD/v68/i6/e064016
http://prd.aps.org/abstract/PRD/v68/i6/e064016
Language
en
Publishing department/division
Advisor name
Examining committee
General Description / Additional Comments
Institution and School/Department of submitter
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών