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Topics in stringy cosmology
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Mathematics and Applied Mathematics
2014
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| _version_ | 1867614214979321856 |
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| access_status_str | Open Access |
| author | Goheer, Naureen |
| author2 | Dunsby, Peter K S |
| author_browse | Dunsby, Peter K S Goheer, Naureen |
| author_facet | Dunsby, Peter K S Goheer, Naureen |
| author_sort | Goheer, Naureen |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/4886 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:48:29.781Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mathematics and Applied Mathematics |
| publisherStr | Department of Mathematics and Applied Mathematics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/4886 Topics in stringy cosmology Goheer, Naureen Dunsby, Peter K S Mathematics and Applied Mathematics Includes bibliographical references. This thesis is composed of two distinct research topics. The first topic concerns Randall-Sundrum cosmological models, in particular their isotropization properties at early times. We first study the state space of inflationary braneworld models with exponential potential and identify the past and future attractors within the homogeneous state space. Our main result is that the isotropic high energy BDL model is the generic past attractor in the state space of FLRW braneworld models. In the state space of Bianchi I models both the BDL model and the inflationary anisotropic Kasner model are past attractors. We then address the question of isotropization using a different approach by studying the evolution of general inhomogeneous and anisotropic perturbations around the spatially flat FLRW braneworld background for three different energy regimes. Here we find that for the high energy braneworld background, the physically relevant anisotropic, inhomogeneous perturbations decay when approaching the initial singularity. We confirm the standard results for thelow energy limit: as in General Relativity, the anisotropy here grows in the past. We conclude that the initial singularity appears to be generically homogeneous and isotropic in the braneworld context. 2014-07-31T08:07:07Z 2014-07-31T08:07:07Z 2004 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/4886 eng application/pdf Department of Mathematics and Applied Mathematics Faculty of Science University of Cape Town |
| spellingShingle | Mathematics and Applied Mathematics Goheer, Naureen Topics in stringy cosmology |
| thesis_degree_str | Doctoral |
| title | Topics in stringy cosmology |
| title_full | Topics in stringy cosmology |
| title_fullStr | Topics in stringy cosmology |
| title_full_unstemmed | Topics in stringy cosmology |
| title_short | Topics in stringy cosmology |
| title_sort | topics in stringy cosmology |
| topic | Mathematics and Applied Mathematics |
| url | http://hdl.handle.net/11427/4886 |
| work_keys_str_mv | AT goheernaureen topicsinstringycosmology |