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Doctoral Thesis
DOI
https://doi.org/10.11606/T.43.1999.tde-24022014-110739
Document
Author
Full name
Luís Carlos Malacarne
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1999
Supervisor
Committee
Gomes, Marcelo Otavio Caminha (President)
Ferreira, Luiz Agostinho
Girotti, Horacio Oscar
Teotonio Sobrinho, Paulo
Wreszinski, Walter Felipe
Title in Portuguese
Estudos sobre Teorias com Chern-Simons: Equivalência entre Modelos e Efeito Aharonov-Bohm Não-Abeliano
Keywords in Portuguese
Efeito Arahonov-Bohm
Modelos de Maxwelle-Chern-Simons e Self-Dual.
Teoria de Campos em (2+1) dimensões
Teoria de Chern-Simons
Abstract in Portuguese
O objetivo desta tese é estudar alguns modelos contendo o termo de Chern-Simons, cuja presença induz várias características tais como massa topológica e spin fracionário. Iniciamos tratando o problema da equivalência entre os modelos Auto-Dual minimamente acoplado com o campo de Dirac, e o modelo de Maxwell-Chern-Simons com um acoplamento magnético com férmions. Nós mostramos que os setores fermiônicos dos modelos somente são equivalentes se adicionarmos uma auto-interação tipo Thirring. Em seguida, analisamos o efeito Aharonov-Bohm não-Abeliano para partículas de spin 0 e ½. Partindo da teoria quântica de campos relativística no gauge de Coulomb e usando o procedimento do corte intermediário, para separar o momento de integração nas regiões de baixa e alta energia, nós obtemos o limite não relativístico dos modelos. Desta forma as correções radiativas, tais como polarização do vácuo e correção de vértice, são automaticamente incluídas. Finalizando estudamos algumas
Title in English
Studies on theories with Chern-Simons: equivalence between models and Aharonov-Bohm effect is not abelian.
Keywords in English
Arahonov-Bohm effect
Chern-Simons theory
Field Theory in (2 +1) dimensions
models Maxwelle-Chern-Simons and Self-Dual.
Abstract in English
The aim of this work is to study some models with Chern-Simons term~ which induces several properties such as l-opological mass and fractional spin. We start studying the exact equivalence between the Self-Dual model minimally coupled to a Dirac field and the Maxwell-Chern-Simons model witb non-minimal magnetic coupling to fermions. Weshow that the fermions sectors of the models are equivalent only if a Thirring like interaction is included. Next we analyze the non-Abelian Aharonov-Bohm scattering for 0 and 1/2 spin particles. Starting Crom the relatistic quantum field theory and using 8 Coulomb gauge rormalism the one loop renorrnalizalion is implemented. Trough the introduction of na intermediaf) cutoff, separating the regions of high and low integration momentum the nonrelativistic Umit is derived. In this approach CJuant.um field theory vacuum polarization and anomalous magnetic momentum are automatically incorporated. Va also study some properties of the chat'ged one spin particles interacting wit.h Chern Simons field.
 
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Publishing Date
2014-02-24
 
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