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Identifier

000364414

Title

A study of codimension-2 gravitational defects with Gauss-Bonnet action

Alternative Title

Μελέτη βαρυζικών ατελειών συν-διάστασης με δράση Gauss-Bonnet

Author

Ηρακλείδη, Μαρία

Thesis advisor

Τσάμης, Νικόλαος
Κόφινας, Γεώργιος

Abstract

We study codimension-2 gravitational defects with Gauss-Bonnet action. In particularly, we focus on the case of a conical defect in a 4-dimensional spacetime (brane) embedded in a higher 6-dimensional spacetime (bulk). We examine the general case for the six-dimensional metric in the case of axial symmetry and in the case of cosmology as well. We derive the matching conditions describing the discontinuity of the geometrical objects from the brane to the bulk. We also extract all the effective equations at the brane position. We finally examine the cosmology of this setup and we find the evolution equation for the Hubble parameter in two characteristic cases of conical singularity structure.

Language

English

Subject

Branworld

Gravity

Υπερεπιφάνειες

Issue date

2011-03-18

Collection

School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses

Type of Work--Post-graduate theses

Views

485

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