A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models

Detalhes bibliográficos
Autor(a) principal: Herdeiro, C. A. R.
Data de Publicação: 2020
Outros Autores: Oliveira, J. M S., Radu, E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/29839
Resumo: Recently, no-go theorems for the existence of solitonic solutions in Einstein-Maxwell-scalar (EMS) models have been established (Herdeiro and Oliveira in Class Quantum Gravity 36(10):105015, 2019). Here we discuss how these theorems can be circumvented by a specific class of non-minimal coupling functions between a real, canonical scalar field and the electromagnetic field. When the non-minimal coupling function diverges in a specific way near the location of a point charge, it regularises all physical quantities yielding an everywhere regular, localised lump of energy. Such solutions are possible even in flat spacetime Maxwell-scalar models, wherein the model is fully integrable in the spherical sector, and exact solutions can be obtained, yielding an explicit mechanism to de-singularise the Coulomb field. Considering their gravitational backreaction, the corresponding (numerical) EMS solitons provide a simple example of self-gravitating, localised energy lumps.
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spelling A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar modelsRecently, no-go theorems for the existence of solitonic solutions in Einstein-Maxwell-scalar (EMS) models have been established (Herdeiro and Oliveira in Class Quantum Gravity 36(10):105015, 2019). Here we discuss how these theorems can be circumvented by a specific class of non-minimal coupling functions between a real, canonical scalar field and the electromagnetic field. When the non-minimal coupling function diverges in a specific way near the location of a point charge, it regularises all physical quantities yielding an everywhere regular, localised lump of energy. Such solutions are possible even in flat spacetime Maxwell-scalar models, wherein the model is fully integrable in the spherical sector, and exact solutions can be obtained, yielding an explicit mechanism to de-singularise the Coulomb field. Considering their gravitational backreaction, the corresponding (numerical) EMS solitons provide a simple example of self-gravitating, localised energy lumps.Springer2020-11-18T17:57:13Z2020-01-01T00:00:00Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/29839eng1434-604410.1140/epjc/s10052-019-7583-9Herdeiro, C. A. R.Oliveira, J. M S.Radu, E.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:57:40Zoai:ria.ua.pt:10773/29839Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:02:03.000402Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
title A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
spellingShingle A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
Herdeiro, C. A. R.
title_short A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
title_full A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
title_fullStr A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
title_full_unstemmed A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
title_sort A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models
author Herdeiro, C. A. R.
author_facet Herdeiro, C. A. R.
Oliveira, J. M S.
Radu, E.
author_role author
author2 Oliveira, J. M S.
Radu, E.
author2_role author
author
dc.contributor.author.fl_str_mv Herdeiro, C. A. R.
Oliveira, J. M S.
Radu, E.
description Recently, no-go theorems for the existence of solitonic solutions in Einstein-Maxwell-scalar (EMS) models have been established (Herdeiro and Oliveira in Class Quantum Gravity 36(10):105015, 2019). Here we discuss how these theorems can be circumvented by a specific class of non-minimal coupling functions between a real, canonical scalar field and the electromagnetic field. When the non-minimal coupling function diverges in a specific way near the location of a point charge, it regularises all physical quantities yielding an everywhere regular, localised lump of energy. Such solutions are possible even in flat spacetime Maxwell-scalar models, wherein the model is fully integrable in the spherical sector, and exact solutions can be obtained, yielding an explicit mechanism to de-singularise the Coulomb field. Considering their gravitational backreaction, the corresponding (numerical) EMS solitons provide a simple example of self-gravitating, localised energy lumps.
publishDate 2020
dc.date.none.fl_str_mv 2020-11-18T17:57:13Z
2020-01-01T00:00:00Z
2020-01-01
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://hdl.handle.net/10773/29839
url http://hdl.handle.net/10773/29839
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1434-6044
10.1140/epjc/s10052-019-7583-9
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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