Observational imprints from Loop Quantum Cosmology
The standard model of cosmology assumes a homogeneous and isotropic universe that undergoes a period of exponential expansion very early on, named inflation. This stretches quantum fluctuations from the onset of inflation to cosmological scales, which seed the temperature, polarization and matter an...
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| Format: | Doctoral thesis |
| Publication date: | 2024 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/103149 |
| Online Access: | https://hdl.handle.net/20.500.14352/103149 |
| Access Level: | Open access |
| Keyword: | 524.8(043.2) Cosmología Astrofísica 2101 Cosmología y Cosmogonía |
| _version_ | 1878731352310808576 |
|---|---|
| author | Rita Barcelos Guerreiro Gonçalves, Neves |
| author_browse | Rita Barcelos Guerreiro Gonçalves, Neves |
| author_facet | Rita Barcelos Guerreiro Gonçalves, Neves |
| author_role | author |
| collection | Docta Complutense |
| description | The standard model of cosmology assumes a homogeneous and isotropic universe that undergoes a period of exponential expansion very early on, named inflation. This stretches quantum fluctuations from the onset of inflation to cosmological scales, which seed the temperature, polarization and matter anisotropies that we observe. However, this paradigm ignores pre-inflationary physics, as shortly before inflation there is the initial big-bang singularity. Loop Quantum Cosmology (LQC) is a promising approach to quantum cosmology. Its most outstanding result is that of the resolution of the classical initial singularity in terms of aquantum bounce that connects a contracting branch of the Universe with an expanding one. Consequently, it provides singularity-free pre-inflationary dynamics. Within this context, it is no longer justified to consider that every mode of the cosmological perturbations reaches the onset of inflation in the natural vacuum state of standard cosmology. In fact, some modes might reach it in an excited state, which may leave imprints in their power spectra at the end of inflation and therefore in observations of the Cosmic Microwave Background (CMB). The goal of this thesis is to search for such imprints from LQC in the CMB. We work in the hybrid approach to cosmological perturbations in LQC to do so... |
| eu_rights_str_mv | openAccess |
| format | doctoralThesis |
| id | ES_2ddc77affb4e9d875ea82fa22c834e88 |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/103149 |
| publishDate | 2024 |
| publishDateSort | 2024 |
| publisher | Universidad Complutense de Madrid |
| publisherStr | Universidad Complutense de Madrid |
| reponame_str | Docta Complutense |
| spelling | Observational imprints from Loop Quantum Cosmology Vestigios observacionales de Cosmologia Cuántica de Lazos Rita Barcelos Guerreiro Gonçalves, Neves 524.8(043.2) Cosmología Astrofísica 2101 Cosmología y Cosmogonía The standard model of cosmology assumes a homogeneous and isotropic universe that undergoes a period of exponential expansion very early on, named inflation. This stretches quantum fluctuations from the onset of inflation to cosmological scales, which seed the temperature, polarization and matter anisotropies that we observe. However, this paradigm ignores pre-inflationary physics, as shortly before inflation there is the initial big-bang singularity. Loop Quantum Cosmology (LQC) is a promising approach to quantum cosmology. Its most outstanding result is that of the resolution of the classical initial singularity in terms of aquantum bounce that connects a contracting branch of the Universe with an expanding one. Consequently, it provides singularity-free pre-inflationary dynamics. Within this context, it is no longer justified to consider that every mode of the cosmological perturbations reaches the onset of inflation in the natural vacuum state of standard cosmology. In fact, some modes might reach it in an excited state, which may leave imprints in their power spectra at the end of inflation and therefore in observations of the Cosmic Microwave Background (CMB). The goal of this thesis is to search for such imprints from LQC in the CMB. We work in the hybrid approach to cosmological perturbations in LQC to do so... Universidad Complutense de Madrid https://hdl.handle.net/20.500.14352/103149 |
| spellingShingle | Observational imprints from Loop Quantum Cosmology Rita Barcelos Guerreiro Gonçalves, Neves 524.8(043.2) Cosmología Astrofísica 2101 Cosmología y Cosmogonía |
| title | Observational imprints from Loop Quantum Cosmology |
| title_full | Observational imprints from Loop Quantum Cosmology |
| title_fullStr | Observational imprints from Loop Quantum Cosmology |
| title_full_unstemmed | Observational imprints from Loop Quantum Cosmology |
| title_short | Observational imprints from Loop Quantum Cosmology |
| title_sort | Observational imprints from Loop Quantum Cosmology |
| topic | 524.8(043.2) Cosmología Astrofísica 2101 Cosmología y Cosmogonía |
| topic_facet | 524.8(043.2) Cosmología Astrofísica 2101 Cosmología y Cosmogonía |
| url | https://hdl.handle.net/20.500.14352/103149 |