Dilatonic current-carrying cosmic strings
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.67.123509 http://hdl.handle.net/11449/224343 |
Resumo: | We investigate the nature of ordinary cosmic vortices in some scalar-tensor extensions of gravity. We find solutions for which the dilaton field condenses inside the vortex core. These solutions can be interpreted as raising the degeneracy between the eigenvalues of the effective stress-energy tensor, namely, the energy per unit length U and the tension T, by picking a privileged spacelike or timelike coordinate direction; in the latter case, a phase frequency threshold occurs that is similar to what is found in ordinary neutral current-carrying cosmic strings. We find that the dilaton contribution for the equation of state, once averaged along the string worldsheet, vanishes, leading to an effective Nambu-Goto behavior of such a string network in cosmology, i.e.on very large scales. It is found also that on small scales, the energy per unit length and tension depend on the string internal coordinates in such a way as to permit the existence of centrifugally supported equilibrium configuration, also known as vortons, whose stability, depending on the very short distance (unknown) physics, can lead to catastrophic consequences on the evolution of the Universe. © 2003 The American Physical Society. |
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Dilatonic current-carrying cosmic stringsWe investigate the nature of ordinary cosmic vortices in some scalar-tensor extensions of gravity. We find solutions for which the dilaton field condenses inside the vortex core. These solutions can be interpreted as raising the degeneracy between the eigenvalues of the effective stress-energy tensor, namely, the energy per unit length U and the tension T, by picking a privileged spacelike or timelike coordinate direction; in the latter case, a phase frequency threshold occurs that is similar to what is found in ordinary neutral current-carrying cosmic strings. We find that the dilaton contribution for the equation of state, once averaged along the string worldsheet, vanishes, leading to an effective Nambu-Goto behavior of such a string network in cosmology, i.e.on very large scales. It is found also that on small scales, the energy per unit length and tension depend on the string internal coordinates in such a way as to permit the existence of centrifugally supported equilibrium configuration, also known as vortons, whose stability, depending on the very short distance (unknown) physics, can lead to catastrophic consequences on the evolution of the Universe. © 2003 The American Physical Society.Institut d’Astrophysique de Paris GReCO FRE 2435-CNRS, 98bis boulevard Arago, Paris, 75014Instituto de Física Teórica Universidade Estadual Paulista, 01405-900Instituto de Física Teórica Universidade Estadual Paulista, 01405-900FRE 2435-CNRSUniversidade Estadual Paulista (UNESP)Peter, PatrickGuimarães, M. E.X. [UNESP]Andrade, V. C. [UNESP]2022-04-28T19:56:00Z2022-04-28T19:56:00Z2003-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.67.123509Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 67, n. 12, 2003.1550-23681550-7998http://hdl.handle.net/11449/22434310.1103/PhysRevD.67.1235092-s2.0-0041627473Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review D - Particles, Fields, Gravitation and Cosmologyinfo:eu-repo/semantics/openAccess2022-04-28T19:56:00Zoai:repositorio.unesp.br:11449/224343Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:56Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Dilatonic current-carrying cosmic strings |
title |
Dilatonic current-carrying cosmic strings |
spellingShingle |
Dilatonic current-carrying cosmic strings Peter, Patrick |
title_short |
Dilatonic current-carrying cosmic strings |
title_full |
Dilatonic current-carrying cosmic strings |
title_fullStr |
Dilatonic current-carrying cosmic strings |
title_full_unstemmed |
Dilatonic current-carrying cosmic strings |
title_sort |
Dilatonic current-carrying cosmic strings |
author |
Peter, Patrick |
author_facet |
Peter, Patrick Guimarães, M. E.X. [UNESP] Andrade, V. C. [UNESP] |
author_role |
author |
author2 |
Guimarães, M. E.X. [UNESP] Andrade, V. C. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
FRE 2435-CNRS Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Peter, Patrick Guimarães, M. E.X. [UNESP] Andrade, V. C. [UNESP] |
description |
We investigate the nature of ordinary cosmic vortices in some scalar-tensor extensions of gravity. We find solutions for which the dilaton field condenses inside the vortex core. These solutions can be interpreted as raising the degeneracy between the eigenvalues of the effective stress-energy tensor, namely, the energy per unit length U and the tension T, by picking a privileged spacelike or timelike coordinate direction; in the latter case, a phase frequency threshold occurs that is similar to what is found in ordinary neutral current-carrying cosmic strings. We find that the dilaton contribution for the equation of state, once averaged along the string worldsheet, vanishes, leading to an effective Nambu-Goto behavior of such a string network in cosmology, i.e.on very large scales. It is found also that on small scales, the energy per unit length and tension depend on the string internal coordinates in such a way as to permit the existence of centrifugally supported equilibrium configuration, also known as vortons, whose stability, depending on the very short distance (unknown) physics, can lead to catastrophic consequences on the evolution of the Universe. © 2003 The American Physical Society. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 2022-04-28T19:56:00Z 2022-04-28T19:56:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevD.67.123509 Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 67, n. 12, 2003. 1550-2368 1550-7998 http://hdl.handle.net/11449/224343 10.1103/PhysRevD.67.123509 2-s2.0-0041627473 |
url |
http://dx.doi.org/10.1103/PhysRevD.67.123509 http://hdl.handle.net/11449/224343 |
identifier_str_mv |
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 67, n. 12, 2003. 1550-2368 1550-7998 10.1103/PhysRevD.67.123509 2-s2.0-0041627473 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D - Particles, Fields, Gravitation and Cosmology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964866218295296 |