Primordial magnetic fields from a non-singular bouncing cosmology

Autores
Membiela, Federico Agustin
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Although inflation is a natural candidate to generate the lengths of coherence of magnetic fields needed to explain current observations, it needs to break conformal invariance of electromagnetism to obtain significant magnetic amplitudes. Of the simplest realizations are the kinetically-coupled theories f^2(ϕ)FμνFμν (or IFF theories). However, these are known to suffer from electric fields backreaction or the strong coupling problem. In this work we shall confirm that such class of theories are problematic to support magnetogenesis during inflationary cosmology. On the contrary, we show that a bouncing cosmology with a contracting phase dominated by an equation of state with p>−ρ/3 can support magnetogenesis, evading the backreaction/strong-coupling problem. Finally, we study safe magnetogenesis in a particular bouncing model with an ekpyrotic-like contracting phase. In this case we found that f^2(ϕ)F^2-instabilities might arise during the final kinetic-driven expanding phase for steep ekpyrotic potentials.
Fil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata; Argentina. Centro Brasileiro de Pesquisas Fisicas; Brasil. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales; Argentina
Materia
PRIMORDIAL MAGNETIC FIELDS
ALTERNATIVES TO INFLATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/8216
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Primordial magnetic fields from a non-singular bouncing cosmologyMembiela, Federico AgustinPRIMORDIAL MAGNETIC FIELDSALTERNATIVES TO INFLATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Although inflation is a natural candidate to generate the lengths of coherence of magnetic fields needed to explain current observations, it needs to break conformal invariance of electromagnetism to obtain significant magnetic amplitudes. Of the simplest realizations are the kinetically-coupled theories f^2(ϕ)FμνFμν (or IFF theories). However, these are known to suffer from electric fields backreaction or the strong coupling problem. In this work we shall confirm that such class of theories are problematic to support magnetogenesis during inflationary cosmology. On the contrary, we show that a bouncing cosmology with a contracting phase dominated by an equation of state with p>−ρ/3 can support magnetogenesis, evading the backreaction/strong-coupling problem. Finally, we study safe magnetogenesis in a particular bouncing model with an ekpyrotic-like contracting phase. In this case we found that f^2(ϕ)F^2-instabilities might arise during the final kinetic-driven expanding phase for steep ekpyrotic potentials.Fil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata; Argentina. Centro Brasileiro de Pesquisas Fisicas; Brasil. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales; ArgentinaElsevier2014-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8216Membiela, Federico Agustin; Primordial magnetic fields from a non-singular bouncing cosmology; Elsevier; Nuclear Physics B; 885; 5-2014; 196-2240550-3213enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0550321314001606info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.05.018info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1312.2162info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:08Zoai:ri.conicet.gov.ar:11336/8216instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:35:09.245CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Primordial magnetic fields from a non-singular bouncing cosmology
title Primordial magnetic fields from a non-singular bouncing cosmology
spellingShingle Primordial magnetic fields from a non-singular bouncing cosmology
Membiela, Federico Agustin
PRIMORDIAL MAGNETIC FIELDS
ALTERNATIVES TO INFLATION
title_short Primordial magnetic fields from a non-singular bouncing cosmology
title_full Primordial magnetic fields from a non-singular bouncing cosmology
title_fullStr Primordial magnetic fields from a non-singular bouncing cosmology
title_full_unstemmed Primordial magnetic fields from a non-singular bouncing cosmology
title_sort Primordial magnetic fields from a non-singular bouncing cosmology
dc.creator.none.fl_str_mv Membiela, Federico Agustin
author Membiela, Federico Agustin
author_facet Membiela, Federico Agustin
author_role author
dc.subject.none.fl_str_mv PRIMORDIAL MAGNETIC FIELDS
ALTERNATIVES TO INFLATION
topic PRIMORDIAL MAGNETIC FIELDS
ALTERNATIVES TO INFLATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Although inflation is a natural candidate to generate the lengths of coherence of magnetic fields needed to explain current observations, it needs to break conformal invariance of electromagnetism to obtain significant magnetic amplitudes. Of the simplest realizations are the kinetically-coupled theories f^2(ϕ)FμνFμν (or IFF theories). However, these are known to suffer from electric fields backreaction or the strong coupling problem. In this work we shall confirm that such class of theories are problematic to support magnetogenesis during inflationary cosmology. On the contrary, we show that a bouncing cosmology with a contracting phase dominated by an equation of state with p>−ρ/3 can support magnetogenesis, evading the backreaction/strong-coupling problem. Finally, we study safe magnetogenesis in a particular bouncing model with an ekpyrotic-like contracting phase. In this case we found that f^2(ϕ)F^2-instabilities might arise during the final kinetic-driven expanding phase for steep ekpyrotic potentials.
Fil: Membiela, Federico Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Físicas de Mar del Plata; Argentina. Centro Brasileiro de Pesquisas Fisicas; Brasil. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales; Argentina
description Although inflation is a natural candidate to generate the lengths of coherence of magnetic fields needed to explain current observations, it needs to break conformal invariance of electromagnetism to obtain significant magnetic amplitudes. Of the simplest realizations are the kinetically-coupled theories f^2(ϕ)FμνFμν (or IFF theories). However, these are known to suffer from electric fields backreaction or the strong coupling problem. In this work we shall confirm that such class of theories are problematic to support magnetogenesis during inflationary cosmology. On the contrary, we show that a bouncing cosmology with a contracting phase dominated by an equation of state with p>−ρ/3 can support magnetogenesis, evading the backreaction/strong-coupling problem. Finally, we study safe magnetogenesis in a particular bouncing model with an ekpyrotic-like contracting phase. In this case we found that f^2(ϕ)F^2-instabilities might arise during the final kinetic-driven expanding phase for steep ekpyrotic potentials.
publishDate 2014
dc.date.none.fl_str_mv 2014-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/8216
Membiela, Federico Agustin; Primordial magnetic fields from a non-singular bouncing cosmology; Elsevier; Nuclear Physics B; 885; 5-2014; 196-224
0550-3213
url http://hdl.handle.net/11336/8216
identifier_str_mv Membiela, Federico Agustin; Primordial magnetic fields from a non-singular bouncing cosmology; Elsevier; Nuclear Physics B; 885; 5-2014; 196-224
0550-3213
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0550321314001606
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysb.2014.05.018
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1312.2162
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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