Probing the Dark Universe with Gravitational Waves

Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física Teórica. Fecha de lectura: 09-09-2019

Detalles Bibliográficos
Autor: Ezquiaga Bravo, José María
Tipo de recurso: tesis doctoral
Fecha de publicación:2019
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/689407
Acceso en línea:http://hdl.handle.net/10486/689407
Access Level:acceso abierto
Palabra clave:Cosmogonía - Tesis doctorales
Cosmología - Tesis doctorales
Relatividad, Teoría de la - Tesis doctorales
Física
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spelling Probing the Dark Universe with Gravitational WavesEzquiaga Bravo, José MaríaCosmogonía - Tesis doctoralesCosmología - Tesis doctoralesRelatividad, Teoría de la - Tesis doctoralesFísicaTesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física Teórica. Fecha de lectura: 09-09-2019Gravitational wave (GW) astronomy opens new opportunities to explore the universe and its fundamental laws. This thesis focuses on probing the pillars of the standard cosmological model with GWs, specially its most puzzling components: dark energy (DE) and dark matter (DM). We propose and apply new tests of DE and General Relativity (GR) with the propagation of GWs. We also investigate the formation of black-holes (BHs) in the early universe, which has strong implications on their contribution to the DM and on their GW signatures. Just as electromagnetic radiation can scan materials, GWs can probe the medium in which they propagate. DE models beyond Einstein’s gravity generically modify the propagation of GWs. We identify the speed of GWs as a key test of gravity and find the conditions for an anomalous speed to arise. We emphasis that a non-luminal speed can appear in cosmological models aiming at DE such as Galileons, but also in environments with a spatial profile induced by screening or scalar hair. After the multi-messenger event GW170817, we determine the consequences of the tight constraint on the speed of GWs for different classes of gravity theories and DE models, setting the dead ends and the road ahead. Standard sirens like GW170817 constrain as well the GW luminosity distance. We derive this observable in general theories of gravity and discuss its detectability with the future space-based detector LISA. Particularly distinguishable oscillatory patters are produced by GW oscillations, a phenomenon that we study in detail. Other probes of GW oscillations are modified wave-forms, induced anomalous speeds and polarization dependent signals. Primordial BHs (PBHs) could be a unique relic to unveil the physics of the early universe. We study the production of PBHs in single field model of inflation with a quasi-inflection point, showing the growth of perturbations beyond slow-roll (SR) at sub- and super-horizon scales. We propose a particle physics motivated model, critical Higgs inflation, achieving a copious PBH production with several GW signatures. However, when curvature fluctuations are enhanced, quantum diffusion dominates the classical inflationary dynamics. We develop a formalism based on stochastic inflation beyond SR to account for this effect. We encounter that the classical prediction is importantly modified, with relevant non-Gaussian contributions. To quantify better the quantum correction, we devise a method to compute directly the tail of the curvature perturbation distributions. As a first step, we apply it to SR inflation. We conclude that the abundance of PBHs is many orders of magnitude larger than the Gaussian prediction, discussing its implications for inflationary model building as well as for the GW observables. Altogether, GW astronomy stands as a powerful channel to advance forward in the quest for understanding the dark universe. We discuss the future prospects of this line of research, highlighting the theoretical challenges and observational opportunities that next generation GW detectors will provide.García-Bellido Capdevila, JuanDepartamento de Física TeóricaFacultad de Ciencias20192019-09-09doctoral thesishttp://purl.org/coar/resource_type/c_db06NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/doctoralThesisapplication/pdfhttp://hdl.handle.net/10486/689407reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6894072026-06-23T12:46:27Z
dc.title.none.fl_str_mv Probing the Dark Universe with Gravitational Waves
title Probing the Dark Universe with Gravitational Waves
spellingShingle Probing the Dark Universe with Gravitational Waves
Ezquiaga Bravo, José María
Cosmogonía - Tesis doctorales
Cosmología - Tesis doctorales
Relatividad, Teoría de la - Tesis doctorales
Física
title_short Probing the Dark Universe with Gravitational Waves
title_full Probing the Dark Universe with Gravitational Waves
title_fullStr Probing the Dark Universe with Gravitational Waves
title_full_unstemmed Probing the Dark Universe with Gravitational Waves
title_sort Probing the Dark Universe with Gravitational Waves
dc.creator.none.fl_str_mv Ezquiaga Bravo, José María
author Ezquiaga Bravo, José María
author_facet Ezquiaga Bravo, José María
author_role author
dc.contributor.none.fl_str_mv García-Bellido Capdevila, Juan
Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Cosmogonía - Tesis doctorales
Cosmología - Tesis doctorales
Relatividad, Teoría de la - Tesis doctorales
Física
topic Cosmogonía - Tesis doctorales
Cosmología - Tesis doctorales
Relatividad, Teoría de la - Tesis doctorales
Física
description Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física Teórica. Fecha de lectura: 09-09-2019
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-09-09
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/689407
url http://hdl.handle.net/10486/689407
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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