Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant

Autores
Lopez Nacir, Diana Laura; Rovner, Julián
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We consider a theory of N self-interacting quantum scalar fields with quartic O(N)-symmetric potential, with a coupling constant λ, in a generic curved spacetime. We analyze the renormalization process of the semiclassical Einstein equations at leading order in the 1/N expansion for different renormailzation schemes, namely: the traditional one that sets the geometry of the spacetime to be Minkowski at the renormalization point and other schemes (originally proposed in [1,2]) that set the geometry to be that of a fixed de Sitter spacetime. In particular, we study the quantum backreaction for fields in de Sitter spacetimes with masses much smaller than the expansion rate H. We find that the scheme that uses the classical de Sitter background solution at the renormalization point, stands out as the most convenient to study the quantum effects on de Sitter spacetimes. We obtain that the backreaction is suppressed by H2/Mpl2 with no logarithmic enhancement factor of lnλ, giving only a small screening of the classical cosmological constant due to the backreaction of such quantum fields. We point out the use of the new schemes can also be more convenient than the traditional one to study quantum effects in other spacetimes relevant for cosmology.
Fil: Lopez Nacir, Diana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Rovner, Julián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Materia
QUANTUM FIELDS
CURVED SPACETIMES
INFRARRED EFFECTS
BACKREACTION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/181621
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constantLopez Nacir, Diana LauraRovner, JuliánQUANTUM FIELDSCURVED SPACETIMESINFRARRED EFFECTSBACKREACTIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We consider a theory of N self-interacting quantum scalar fields with quartic O(N)-symmetric potential, with a coupling constant λ, in a generic curved spacetime. We analyze the renormalization process of the semiclassical Einstein equations at leading order in the 1/N expansion for different renormailzation schemes, namely: the traditional one that sets the geometry of the spacetime to be Minkowski at the renormalization point and other schemes (originally proposed in [1,2]) that set the geometry to be that of a fixed de Sitter spacetime. In particular, we study the quantum backreaction for fields in de Sitter spacetimes with masses much smaller than the expansion rate H. We find that the scheme that uses the classical de Sitter background solution at the renormalization point, stands out as the most convenient to study the quantum effects on de Sitter spacetimes. We obtain that the backreaction is suppressed by H2/Mpl2 with no logarithmic enhancement factor of lnλ, giving only a small screening of the classical cosmological constant due to the backreaction of such quantum fields. We point out the use of the new schemes can also be more convenient than the traditional one to study quantum effects in other spacetimes relevant for cosmology.Fil: Lopez Nacir, Diana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Rovner, Julián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaAmerican Physical Society2021-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/181621Lopez Nacir, Diana Laura; Rovner, Julián; Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 103; 12; 6-2021; 1-172470-00102470-0029CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.125002info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.103.125002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:46:30Zoai:ri.conicet.gov.ar:11336/181621instacron: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:34982025-10-22 11:46:30.884CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
title Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
spellingShingle Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
Lopez Nacir, Diana Laura
QUANTUM FIELDS
CURVED SPACETIMES
INFRARRED EFFECTS
BACKREACTION
title_short Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
title_full Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
title_fullStr Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
title_full_unstemmed Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
title_sort Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant
dc.creator.none.fl_str_mv Lopez Nacir, Diana Laura
Rovner, Julián
author Lopez Nacir, Diana Laura
author_facet Lopez Nacir, Diana Laura
Rovner, Julián
author_role author
author2 Rovner, Julián
author2_role author
dc.subject.none.fl_str_mv QUANTUM FIELDS
CURVED SPACETIMES
INFRARRED EFFECTS
BACKREACTION
topic QUANTUM FIELDS
CURVED SPACETIMES
INFRARRED EFFECTS
BACKREACTION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We consider a theory of N self-interacting quantum scalar fields with quartic O(N)-symmetric potential, with a coupling constant λ, in a generic curved spacetime. We analyze the renormalization process of the semiclassical Einstein equations at leading order in the 1/N expansion for different renormailzation schemes, namely: the traditional one that sets the geometry of the spacetime to be Minkowski at the renormalization point and other schemes (originally proposed in [1,2]) that set the geometry to be that of a fixed de Sitter spacetime. In particular, we study the quantum backreaction for fields in de Sitter spacetimes with masses much smaller than the expansion rate H. We find that the scheme that uses the classical de Sitter background solution at the renormalization point, stands out as the most convenient to study the quantum effects on de Sitter spacetimes. We obtain that the backreaction is suppressed by H2/Mpl2 with no logarithmic enhancement factor of lnλ, giving only a small screening of the classical cosmological constant due to the backreaction of such quantum fields. We point out the use of the new schemes can also be more convenient than the traditional one to study quantum effects in other spacetimes relevant for cosmology.
Fil: Lopez Nacir, Diana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Rovner, Julián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
description We consider a theory of N self-interacting quantum scalar fields with quartic O(N)-symmetric potential, with a coupling constant λ, in a generic curved spacetime. We analyze the renormalization process of the semiclassical Einstein equations at leading order in the 1/N expansion for different renormailzation schemes, namely: the traditional one that sets the geometry of the spacetime to be Minkowski at the renormalization point and other schemes (originally proposed in [1,2]) that set the geometry to be that of a fixed de Sitter spacetime. In particular, we study the quantum backreaction for fields in de Sitter spacetimes with masses much smaller than the expansion rate H. We find that the scheme that uses the classical de Sitter background solution at the renormalization point, stands out as the most convenient to study the quantum effects on de Sitter spacetimes. We obtain that the backreaction is suppressed by H2/Mpl2 with no logarithmic enhancement factor of lnλ, giving only a small screening of the classical cosmological constant due to the backreaction of such quantum fields. We point out the use of the new schemes can also be more convenient than the traditional one to study quantum effects in other spacetimes relevant for cosmology.
publishDate 2021
dc.date.none.fl_str_mv 2021-06
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/11336/181621
Lopez Nacir, Diana Laura; Rovner, Julián; Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 103; 12; 6-2021; 1-17
2470-0010
2470-0029
CONICET Digital
CONICET
url http://hdl.handle.net/11336/181621
identifier_str_mv Lopez Nacir, Diana Laura; Rovner, Julián; Quantum backreaction of O (N) -symmetric scalar fields and de Sitter spacetimes at the renormalization point: Renormalization schemes and the screening of the cosmological constant; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 103; 12; 6-2021; 1-17
2470-0010
2470-0029
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.125002
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.103.125002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
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 12.982451

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