The δ expansion and the principle of minimal sensitivity
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 1998 |
| Outros Autores: | , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Institucional da UNESP |
| Texto Completo: | http://dx.doi.org/10.1590/S0103-97331998000100009 http://hdl.handle.net/11449/65408 |
Resumo: | The δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Different ways of implementing the principle of minimal sensitivity to the δ-expansion produce in general different results for observables. For illustration we use the Nambu-Jona-Lasinio model for chiral symmetry restoration at finite density and compare results with those obtained with the Hartree-Fock approximation. |
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The δ expansion and the principle of minimal sensitivityThe δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Different ways of implementing the principle of minimal sensitivity to the δ-expansion produce in general different results for observables. For illustration we use the Nambu-Jona-Lasinio model for chiral symmetry restoration at finite density and compare results with those obtained with the Hartree-Fock approximation.Institut für Kernphysik Universität Mainz, D-55099 MainzInst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo-SPDepartamento de Física Univ. Federal de Santa Catarina, 88.040-900 Florianopolis, S.C.Instituto de Física Universidade de São Paulo, Caixa Postal 66318, 05315-970 São Paulo, S.P.Inst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo-SPUniversität MainzUniversidade Estadual Paulista (Unesp)Universidade Federal de Santa Catarina (UFSC)Universidade de São Paulo (USP)Krein, G. [UNESP]Menezes, D. P.Nielsen, M.Pinto, M. B.2014-05-27T11:19:33Z2014-05-27T11:19:33Z1998-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article66-71application/pdfhttp://dx.doi.org/10.1590/S0103-97331998000100009Brazilian Journal of Physics, v. 28, n. 1, p. 66-71, 1998.0103-9733http://hdl.handle.net/11449/6540810.1590/S0103-97331998000100009S0103-97331998000100009WOS:0000768246000092-s2.0-00405772542-s2.0-0040577254.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Physics1.0820,276info:eu-repo/semantics/openAccess2023-12-16T06:23:51Zoai:repositorio.unesp.br:11449/65408Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-16T06:23:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
| dc.title.none.fl_str_mv |
The δ expansion and the principle of minimal sensitivity |
| title |
The δ expansion and the principle of minimal sensitivity |
| spellingShingle |
The δ expansion and the principle of minimal sensitivity Krein, G. [UNESP] |
| title_short |
The δ expansion and the principle of minimal sensitivity |
| title_full |
The δ expansion and the principle of minimal sensitivity |
| title_fullStr |
The δ expansion and the principle of minimal sensitivity |
| title_full_unstemmed |
The δ expansion and the principle of minimal sensitivity |
| title_sort |
The δ expansion and the principle of minimal sensitivity |
| author |
Krein, G. [UNESP] |
| author_facet |
Krein, G. [UNESP] Menezes, D. P. Nielsen, M. Pinto, M. B. |
| author_role |
author |
| author2 |
Menezes, D. P. Nielsen, M. Pinto, M. B. |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Universität Mainz Universidade Estadual Paulista (Unesp) Universidade Federal de Santa Catarina (UFSC) Universidade de São Paulo (USP) |
| dc.contributor.author.fl_str_mv |
Krein, G. [UNESP] Menezes, D. P. Nielsen, M. Pinto, M. B. |
| description |
The δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Different ways of implementing the principle of minimal sensitivity to the δ-expansion produce in general different results for observables. For illustration we use the Nambu-Jona-Lasinio model for chiral symmetry restoration at finite density and compare results with those obtained with the Hartree-Fock approximation. |
| publishDate |
1998 |
| dc.date.none.fl_str_mv |
1998-03-01 2014-05-27T11:19:33Z 2014-05-27T11:19:33Z |
| 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/10.1590/S0103-97331998000100009 Brazilian Journal of Physics, v. 28, n. 1, p. 66-71, 1998. 0103-9733 http://hdl.handle.net/11449/65408 10.1590/S0103-97331998000100009 S0103-97331998000100009 WOS:000076824600009 2-s2.0-0040577254 2-s2.0-0040577254.pdf |
| url |
http://dx.doi.org/10.1590/S0103-97331998000100009 http://hdl.handle.net/11449/65408 |
| identifier_str_mv |
Brazilian Journal of Physics, v. 28, n. 1, p. 66-71, 1998. 0103-9733 10.1590/S0103-97331998000100009 S0103-97331998000100009 WOS:000076824600009 2-s2.0-0040577254 2-s2.0-0040577254.pdf |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Brazilian Journal of Physics 1.082 0,276 |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
66-71 application/pdf |
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Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
| instname_str |
Universidade Estadual Paulista (UNESP) |
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UNESP |
| institution |
UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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1799965308500312064 |