Vacuum polarization in the horizonless Bardeen metric

Autores
Boasso, Andrés Matías; Mazzitelli, Francisco Diego
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We compute the renormalized stress-energy tensor for a massless quantum scalar field in the background of the horizonless Bardeen spacetime. Within the weak-field approximation, we show that the vacuum fluctuations differ significantly between conformally and non-conformally coupled fields, both in magnitude and in their behavior at short and intermediate distances. At large distances, we recover the universal asymptotic behavior previously observed in black hole and Newtonian star backgrounds. Going beyond the weak-field regime, we find that, for certain parameter ranges, the modes of the field can develop imaginary frequencies, leading to instabilities and an exponential growth of vacuum fluctuations. We also discuss critically the applicability of the anomaly-induced effective action for computing the renormalized stress-energy tensor in the conformally coupled case.
Fil: Boasso, Andrés Matías. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Mazzitelli, Francisco Diego. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Materia
QUANTUM FIELD THEORY IN CURVED SPACE
RENORMALIZED STRESS-ENERGY TENSOR
BARDEEN METRIC
TACHYONIC INSTABILITIES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/277022
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/277022
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Vacuum polarization in the horizonless Bardeen metricBoasso, Andrés MatíasMazzitelli, Francisco DiegoQUANTUM FIELD THEORY IN CURVED SPACERENORMALIZED STRESS-ENERGY TENSORBARDEEN METRICTACHYONIC INSTABILITIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We compute the renormalized stress-energy tensor for a massless quantum scalar field in the background of the horizonless Bardeen spacetime. Within the weak-field approximation, we show that the vacuum fluctuations differ significantly between conformally and non-conformally coupled fields, both in magnitude and in their behavior at short and intermediate distances. At large distances, we recover the universal asymptotic behavior previously observed in black hole and Newtonian star backgrounds. Going beyond the weak-field regime, we find that, for certain parameter ranges, the modes of the field can develop imaginary frequencies, leading to instabilities and an exponential growth of vacuum fluctuations. We also discuss critically the applicability of the anomaly-induced effective action for computing the renormalized stress-energy tensor in the conformally coupled case.Fil: Boasso, Andrés Matías. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Mazzitelli, Francisco Diego. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaAmerican Physical Society2025-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/277022Boasso, Andrés Matías; Mazzitelli, Francisco Diego; Vacuum polarization in the horizonless Bardeen metric; American Physical Society; Physical Review D; 112; 10; 11-2025; 1-112470-00102470-0029CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/cqtg-6nxhinfo:eu-repo/semantics/altIdentifier/doi/10.1103/cqtg-6nxhinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-06-17T10:20:36Zoai:ri.conicet.gov.ar:11336/277022instacron: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:34982026-06-17 10:20:37.15CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Vacuum polarization in the horizonless Bardeen metric
title Vacuum polarization in the horizonless Bardeen metric
spellingShingle Vacuum polarization in the horizonless Bardeen metric
Boasso, Andrés Matías
QUANTUM FIELD THEORY IN CURVED SPACE
RENORMALIZED STRESS-ENERGY TENSOR
BARDEEN METRIC
TACHYONIC INSTABILITIES
title_short Vacuum polarization in the horizonless Bardeen metric
title_full Vacuum polarization in the horizonless Bardeen metric
title_fullStr Vacuum polarization in the horizonless Bardeen metric
title_full_unstemmed Vacuum polarization in the horizonless Bardeen metric
title_sort Vacuum polarization in the horizonless Bardeen metric
dc.creator.none.fl_str_mv Boasso, Andrés Matías
Mazzitelli, Francisco Diego
author Boasso, Andrés Matías
author_facet Boasso, Andrés Matías
Mazzitelli, Francisco Diego
author_role author
author2 Mazzitelli, Francisco Diego
author2_role author
dc.subject.none.fl_str_mv QUANTUM FIELD THEORY IN CURVED SPACE
RENORMALIZED STRESS-ENERGY TENSOR
BARDEEN METRIC
TACHYONIC INSTABILITIES
topic QUANTUM FIELD THEORY IN CURVED SPACE
RENORMALIZED STRESS-ENERGY TENSOR
BARDEEN METRIC
TACHYONIC INSTABILITIES
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 compute the renormalized stress-energy tensor for a massless quantum scalar field in the background of the horizonless Bardeen spacetime. Within the weak-field approximation, we show that the vacuum fluctuations differ significantly between conformally and non-conformally coupled fields, both in magnitude and in their behavior at short and intermediate distances. At large distances, we recover the universal asymptotic behavior previously observed in black hole and Newtonian star backgrounds. Going beyond the weak-field regime, we find that, for certain parameter ranges, the modes of the field can develop imaginary frequencies, leading to instabilities and an exponential growth of vacuum fluctuations. We also discuss critically the applicability of the anomaly-induced effective action for computing the renormalized stress-energy tensor in the conformally coupled case.
Fil: Boasso, Andrés Matías. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Mazzitelli, Francisco Diego. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
description We compute the renormalized stress-energy tensor for a massless quantum scalar field in the background of the horizonless Bardeen spacetime. Within the weak-field approximation, we show that the vacuum fluctuations differ significantly between conformally and non-conformally coupled fields, both in magnitude and in their behavior at short and intermediate distances. At large distances, we recover the universal asymptotic behavior previously observed in black hole and Newtonian star backgrounds. Going beyond the weak-field regime, we find that, for certain parameter ranges, the modes of the field can develop imaginary frequencies, leading to instabilities and an exponential growth of vacuum fluctuations. We also discuss critically the applicability of the anomaly-induced effective action for computing the renormalized stress-energy tensor in the conformally coupled case.
publishDate 2025
dc.date.none.fl_str_mv 2025-11
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/11336/277022
Boasso, Andrés Matías; Mazzitelli, Francisco Diego; Vacuum polarization in the horizonless Bardeen metric; American Physical Society; Physical Review D; 112; 10; 11-2025; 1-11
2470-0010
2470-0029
CONICET Digital
CONICET
url http://hdl.handle.net/11336/277022
identifier_str_mv Boasso, Andrés Matías; Mazzitelli, Francisco Diego; Vacuum polarization in the horizonless Bardeen metric; American Physical Society; Physical Review D; 112; 10; 11-2025; 1-11
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://link.aps.org/doi/10.1103/cqtg-6nxh
info:eu-repo/semantics/altIdentifier/doi/10.1103/cqtg-6nxh
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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 13.040872

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