Inflation and Primordial Black Holes

We review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. We identify general mechanisms to do so, both for single- and multiple-field inflation. In single-fiel...

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Detalles Bibliográficos
Autores: Özsoy, Ogan, Tasinato, Gianmassimo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/308133
Acceso en línea:http://hdl.handle.net/10261/308133
Access Level:acceso abierto
Palabra clave:Inflation
Primordial black holes
Dark matter
Early Universe
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spelling Inflation and Primordial Black HolesÖzsoy, OganTasinato, GianmassimoInflationPrimordial black holesDark matterEarly UniverseWe review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. We identify general mechanisms to do so, both for single- and multiple-field inflation. In single-field inflation, the spectrum of curvature fluctuations is enhanced by pronounced gradients of background quantities controlling the cosmological dynamics, which can induce brief phases of non-slow-roll inflationary evolution. In multiple-field inflation, the amplification occurs through appropriate couplings with additional sectors characterized by tachyonic instabilities that enhance the size of their fluctuations. As representative examples, we consider axion inflation and two-field models of inflation with rapid turns in field space. We develop our discussion in a pedagogical manner by including some of the most relevant calculations and by guiding the reader through the existing theoretical literature, emphasizing general themes common to several models.O.Ö. is supported by the “Juan de la Cierva” fellowship IJC2020-045803-I, the European Structural and Investment Funds and the Czech Ministry of Education, Youth and Sports (Project CoGraDS-CZ.02.1.01/0.0/0.0/15003/0000437) and by the Spanish Research Agency (Agencia Estatal de Investigación) through the Grant IFT Centro de Excelencia Severo Ochoa No CEX2020-001007-S funded by MCIN/AEI/10.13039/501100011033. G.T. is partially funded by the STFC grant ST/T000813/1.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditationPeer reviewedMultidisciplinary Digital Publishing InstituteMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)European CommissionMinistry of Education, Youth and Sports (Czech Republic)Science and Technology Facilities Council (UK)Özsoy, Ogan [0000-0001-8783-1728]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2023202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_dcae04bcPublisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/308133reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI//IJC2020-045803-Iinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2020-001007-Shttps://doi.org/10.3390/universe9050203Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3081332026-05-22T06:33:51Z
dc.title.none.fl_str_mv Inflation and Primordial Black Holes
title Inflation and Primordial Black Holes
spellingShingle Inflation and Primordial Black Holes
Özsoy, Ogan
Inflation
Primordial black holes
Dark matter
Early Universe
title_short Inflation and Primordial Black Holes
title_full Inflation and Primordial Black Holes
title_fullStr Inflation and Primordial Black Holes
title_full_unstemmed Inflation and Primordial Black Holes
title_sort Inflation and Primordial Black Holes
dc.creator.none.fl_str_mv Özsoy, Ogan
Tasinato, Gianmassimo
author Özsoy, Ogan
author_facet Özsoy, Ogan
Tasinato, Gianmassimo
author_role author
author2 Tasinato, Gianmassimo
author2_role author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
European Commission
Ministry of Education, Youth and Sports (Czech Republic)
Science and Technology Facilities Council (UK)
Özsoy, Ogan [0000-0001-8783-1728]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Inflation
Primordial black holes
Dark matter
Early Universe
topic Inflation
Primordial black holes
Dark matter
Early Universe
description We review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. We identify general mechanisms to do so, both for single- and multiple-field inflation. In single-field inflation, the spectrum of curvature fluctuations is enhanced by pronounced gradients of background quantities controlling the cosmological dynamics, which can induce brief phases of non-slow-roll inflationary evolution. In multiple-field inflation, the amplification occurs through appropriate couplings with additional sectors characterized by tachyonic instabilities that enhance the size of their fluctuations. As representative examples, we consider axion inflation and two-field models of inflation with rapid turns in field space. We develop our discussion in a pedagogical manner by including some of the most relevant calculations and by guiding the reader through the existing theoretical literature, emphasizing general themes common to several models.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_dcae04bc
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/308133
url http://hdl.handle.net/10261/308133
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/AEI//IJC2020-045803-I
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2020-001007-S
https://doi.org/10.3390/universe9050203
Sí
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eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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