Particle creation due to tachyonic instability in relativistic stars
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.86.104025 http://hdl.handle.net/11449/227033 |
Resumo: | Dense enough compact objects were recently shown to lead to an exponentially fast increase of the vacuum energy density for some free scalar fields properly coupled to the spacetime curvature as a consequence of a tachyonic-like instability. Once the effect is triggered, the star energy density would be overwhelmed by the vacuum energy density in a few milliseconds. This demands that eventually geometry and field evolve to a new configuration to bring the vacuum back to a stationary regime. Here, we show that the vacuum fluctuations built up during the unstable epoch lead to particle creation in the final stationary state when the tachyonic instability ceases. The amount of created particles depends mostly on the duration of the unstable epoch and final stationary configuration, which are open issues at this point. We emphasize that the particle creation coming from the tachyonic instability will occur even in the adiabatic limit, where the spacetime geometry changes arbitrarily slowly, and therefore is quite distinct from the usual particle creation due to the change in the background geometry. © 2012 American Physical Society. |
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Particle creation due to tachyonic instability in relativistic starsDense enough compact objects were recently shown to lead to an exponentially fast increase of the vacuum energy density for some free scalar fields properly coupled to the spacetime curvature as a consequence of a tachyonic-like instability. Once the effect is triggered, the star energy density would be overwhelmed by the vacuum energy density in a few milliseconds. This demands that eventually geometry and field evolve to a new configuration to bring the vacuum back to a stationary regime. Here, we show that the vacuum fluctuations built up during the unstable epoch lead to particle creation in the final stationary state when the tachyonic instability ceases. The amount of created particles depends mostly on the duration of the unstable epoch and final stationary configuration, which are open issues at this point. We emphasize that the particle creation coming from the tachyonic instability will occur even in the adiabatic limit, where the spacetime geometry changes arbitrarily slowly, and therefore is quite distinct from the usual particle creation due to the change in the background geometry. © 2012 American Physical Society.Instituto de Física de São Carlos Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São PauloInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São PauloInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São PauloUniversidade de São Paulo (USP)Universidade Estadual Paulista (UNESP)Landulfo, A. G.S.Lima, W. C.C.Matsas, G. E.A. [UNESP]Vanzella, D. A.T.2022-04-29T06:01:23Z2022-04-29T06:01:23Z2012-11-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.86.104025Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 86, n. 10, 2012.1550-79981550-2368http://hdl.handle.net/11449/22703310.1103/PhysRevD.86.1040252-s2.0-84869028788Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review D - Particles, Fields, Gravitation and Cosmologyinfo:eu-repo/semantics/openAccess2022-04-29T06:01:23Zoai:repositorio.unesp.br:11449/227033Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:49:08.024427Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Particle creation due to tachyonic instability in relativistic stars |
title |
Particle creation due to tachyonic instability in relativistic stars |
spellingShingle |
Particle creation due to tachyonic instability in relativistic stars Landulfo, A. G.S. |
title_short |
Particle creation due to tachyonic instability in relativistic stars |
title_full |
Particle creation due to tachyonic instability in relativistic stars |
title_fullStr |
Particle creation due to tachyonic instability in relativistic stars |
title_full_unstemmed |
Particle creation due to tachyonic instability in relativistic stars |
title_sort |
Particle creation due to tachyonic instability in relativistic stars |
author |
Landulfo, A. G.S. |
author_facet |
Landulfo, A. G.S. Lima, W. C.C. Matsas, G. E.A. [UNESP] Vanzella, D. A.T. |
author_role |
author |
author2 |
Lima, W. C.C. Matsas, G. E.A. [UNESP] Vanzella, D. A.T. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Landulfo, A. G.S. Lima, W. C.C. Matsas, G. E.A. [UNESP] Vanzella, D. A.T. |
description |
Dense enough compact objects were recently shown to lead to an exponentially fast increase of the vacuum energy density for some free scalar fields properly coupled to the spacetime curvature as a consequence of a tachyonic-like instability. Once the effect is triggered, the star energy density would be overwhelmed by the vacuum energy density in a few milliseconds. This demands that eventually geometry and field evolve to a new configuration to bring the vacuum back to a stationary regime. Here, we show that the vacuum fluctuations built up during the unstable epoch lead to particle creation in the final stationary state when the tachyonic instability ceases. The amount of created particles depends mostly on the duration of the unstable epoch and final stationary configuration, which are open issues at this point. We emphasize that the particle creation coming from the tachyonic instability will occur even in the adiabatic limit, where the spacetime geometry changes arbitrarily slowly, and therefore is quite distinct from the usual particle creation due to the change in the background geometry. © 2012 American Physical Society. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11-07 2022-04-29T06:01:23Z 2022-04-29T06:01:23Z |
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.86.104025 Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 86, n. 10, 2012. 1550-7998 1550-2368 http://hdl.handle.net/11449/227033 10.1103/PhysRevD.86.104025 2-s2.0-84869028788 |
url |
http://dx.doi.org/10.1103/PhysRevD.86.104025 http://hdl.handle.net/11449/227033 |
identifier_str_mv |
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 86, n. 10, 2012. 1550-7998 1550-2368 10.1103/PhysRevD.86.104025 2-s2.0-84869028788 |
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_ |
1808129252725358592 |