Armadilhamento de Campos de Spin-0 em um Anel imerso em (3,1) dimensões

Detalhes bibliográficos
Ano de defesa: 2011
Autor(a) principal: SIMAS, Fabiano de Carvalho lattes
Orientador(a): SANTOS FILHO, Adalto Rodrigues Gomes dos lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal do Maranhão
Programa de Pós-Graduação: PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA/CCET
Departamento: DEPARTAMENTO DE FÍSICA/CCET
País: Brasil
Palavras-chave em Português:
Palavras-chave em Inglês:
Área do conhecimento CNPq:
Link de acesso: https://tedebc.ufma.br/jspui/handle/tede/1952
Resumo: In this work we consider rings constructed with a scalar field ϕ with radial symmetry embedded in the (3, 1) Minkowski spacetime. Such topological defects have radius and thickness related to the energy density and can be attained from a lagrangian density explicitly dependent with the distance,which can be interpreted as an effective theory from a more fundamental model. Neglecting the backreaction on a weak scalar field Φ coupled with the strong field ϕ, a standard mode decomposition leads to a standard action for one-dimensional Klein-Gordon fields living along the ring axis and a two-dimensional Schr¨odinger-like equation, describing massive spin-0 particles. A specific choice of the coupling between the scalar fields Φ and ϕ is able to transform the Schr¨odinger-like equation in a one-dimensional form depending on the radial distance. The interaction is compatible with a repulsive character of the core of the ring and with the presence of resonances around the ring radius. The presence of tachyonic and physical modes are described in a phase space diagram, which is confronted with the numerical analysis of the massive modes. It is found that, for the scale of rings considered, larger radius favor the localization process, and for small radius the leaking of the massive modes is compatible with a repulsive interaction acting between the rings walls and the massive spin-0 particles.