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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2005.tde-02042007-125704
Document
Author
Full name
Carlos Alberto Stechhahn da Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2005
Supervisor
Committee
Gomes, Marcelo Otavio Caminha (President)
Brandt, Fernando Tadeu Caldeira
Pleitez, Vicente
Title in Portuguese
"Efeito Aharonov-Bohm não-comutativo para partículas relativísticas de spin 1/2"
Keywords in Portuguese
1. Física 2. Mecânica Quântica 3. Teoria de Campos
Abstract in Portuguese
Este trabalho destina-se ao estudo de modificações no espalhamento de Aharonov-Bohm para partículas relativísticas com spin 1/2, devido à não comutatividade do espaço, em 2+1 dimensões. As correções para o potencial de Aharonov-Bohm, sendo muito singulares, levam, em geral, ao aparecimento de divergências na expansão perturbativa em torno da teoria livre. Usando, então, como ponto de partida a solução exata da versão comutativa, determinamos, na aproximação de fluxo pequeno, a amplitude invariante, seção de choque diferencial e total, com as divergências eliminadas.
Title in English
Aharonov-Bohm effect for relativistic spin 1/2 particles
Keywords in English
1. Physics 2. Quantum Mechanics 3. Quantum Field Theory
Abstract in English
In this work we study modifications in the Aharonov-Bohm effect for relativistic spin 1/2 particles due the non-commutativity of space in 2+1 dimensions. The corrections for the Aharonov-Bohm potential originated from the non-commutativity of the underlying space are very singular, producing the appearance of divergences in the perturbative expansion around the free theory. Working with the pertubation around the exact solution of the commutative version of the problem, we determine then, in the small flux approximation, the invariant amplitude, and the corrections to the differential and total cross sections with all divergences eliminated.
 
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Publishing Date
2007-05-29
 
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