Cosmological perturbations in string gas cosmology
| dc.contributor | Graduate Program in Physics. | |
| dc.contributor.advisor | Kaya, Ali. | |
| dc.contributor.author | Özsoy, Ogan. | |
| dc.date.accessioned | 2023-03-16T10:38:10Z | |
| dc.date.available | 2023-03-16T10:38:10Z | |
| dc.date.issued | 2011. | |
| dc.description.abstract | The current model of the early universe is mainly based on the in ationary scenario. Despite its phenomenological success in providing a solid mechanism for the generation of cosmological uctuations in the early universe, this scenario su ers from several conceptual problems. Therefore, it is important to investigate the subject within a fundamental theory. Driven by this motivation, in this thesis, we study the cosmological perturbations in the string gas cosmology formalism. First, we give a review on string thermodynamics. Then we go over a recently proposed scenario of producing scale-invariant cosmological perturbations and examine its problems. Finally, we discuss an alternative model based on the open strings attached on a D-brane and nd out that it is hard to realize a scale-free spectrum for the cosmological perturbations. | |
| dc.format.extent | 30cm. | |
| dc.format.pages | ix, 40 leaves ; | |
| dc.identifier.other | PHYS 2011 O87 | |
| dc.identifier.uri | https://digitalarchive.library.bogazici.edu.tr/handle/123456789/13716 | |
| dc.publisher | Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011. | |
| dc.subject.lcsh | Cosmology -- Mathematics. | |
| dc.subject.lcsh | String models -- Mathematics. | |
| dc.title | Cosmological perturbations in string gas cosmology |