Repositório UNIFEI UNIFEI - Campus 1: Itajubá PPG - Programas de Pós Graduação Dissertações
Use este identificador para citar ou linkar para este item: https://repositorio.unifei.edu.br/jspui/handle/123456789/2358
Registro completo de metadados
Campo DCValorIdioma
dc.creatorFERREIRA JUNIOR, Alexsandre Leite-
dc.date.issued2020-08-31-
dc.identifier.urihttps://repositorio.unifei.edu.br/jspui/handle/123456789/2358-
dc.description.sponsorshipAgência 1pt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Itajubápt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectBoundary quantum field theorypt_BR
dc.subjectStochastic motionpt_BR
dc.subjectMassive scalar fieldpt_BR
dc.titleFluctuations of a massive scalar field: temperature and boundarypt_BR
dc.typeDissertaçãopt_BR
dc.date.available2021-03-25-
dc.date.available2021-03-25T14:48:06Z-
dc.date.accessioned2021-03-25T14:48:06Z-
dc.creator.Latteshttp://lattes.cnpq.br/0375563373339784pt_BR
dc.contributor.advisor1DE LORENCI, Vitorio Alberto-
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/1361400129993392pt_BR
dc.description.resumoIt is well established that a change in the physical state of a quantum field induces dispersions on the velocity of a interacting non-relativistic test particle. Here such a interacting model is addressed with a finite transition time between states of the field. Underlining that such induced stochastic motion is different from an usual Brownian motion, as, at late times, the dispersions are bounded and do not depend on the interaction time, without the need for a dissipative force. Further, we study the case for a massive scalar field at finite temperatures, thus generalizing previous investigation in [1]. The results presented here show subvacuum effects even at finite temperature. Nonetheless, novel effects are also unveiled, as a detailed description of the thermal contribution highlights their discrepancy to the usual Brownian motion and stresses the opposing character of mass and temperature. The presence of the field mass weakens thermal contributions and temperature hides the characteristic oscillatory pattern of massive fields. Such interplay is even more relevant in the presence of a boundary, when investigating the distance behavior of the dispersions and the vacuum versus thermal dominance near the wall. As for higher masses the vacuum term dominates for larger distances, being able also to create and interchange in such dominance as the wall is approachedpt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentIFQ - Instituto de Física e Químicapt_BR
dc.publisher.programPrograma de Pós-Graduação: Mestrado - Físicapt_BR
dc.publisher.initialsUNIFEIpt_BR
dc.subject.cnpqCNPQ::CIÊNCIAS EXATAS E DA TERRA::FÍSICApt_BR
dc.relation.referencesFERREIRA JUNIOR, Alexsandre Leite. Fluctuations of a massive scalar field: temperature and boundary. 2020. 70 f. Dissertação (Mestrado em Física) – Universidade Federal de Itajubá, Itajubá, 2020.pt_BR
Aparece nas coleções:Dissertações

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
Dissertação_2021078.pdf1,59 MBAdobe PDFVisualizar/Abrir
Mostrar registro simples do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.