Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-04-09
Braz.J.Phys.37:251-257,2007
Physics
High Energy Physics
High Energy Physics - Theory
7 pages. Based on a talk given by R. O. Ramos at the Infrared QCD in Rio conference, Rio de Janeiro, Brazil, June 5-9, 2006
Scientific paper
10.1590/S0103-97332007000200015
Topological excitations are believed to play an important role in different areas of physics. For example, one case of topical interest is the use of dual models of quantum cromodynamics to understand properties of its vacuum and confinement through the condensation of magnetic monopoles and vortices. Other applications are related to the role of these topological excitations, nonhomogeneous solutions of the field equations, in phase transitions associated to spontaneous symmetry breaking in gauge theories, whose study is of importance in phase transitions in the early universe, for instance. Here we show a derivation of a model dual to the scalar Abelian Higgs model where its topological excitations, namely vortex-strings, become manifest and can be treated in a quantum field theory way. The derivation of the nontrivial contribution of these vacuum excitations to phase transitions and its analogy with superconductivity is then made possible and they are studied here.
Barci Daniel G.
Linhares Cesar A.
Medeiros Neto J. F.
Ramos Rudnei O.
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