Gauge theories in noncommutative geometry and generalization of the Born-Infeld model

Details Gauge theories in noncommutative geometry and generalization of the Born-Infeld model Gauge theories in noncommutative geometry and generalization of the Born-Infeld model

2005-12-30

arxiv.org/abs/math-ph/0512094v1

Physics

Mathematical Physics

in french, Ph.D thesis, 157 pages, see http://tel.ccsd.cnrs.fr/tel-00010487

Scientific paper

Endomorphisms algebras can replace the concept of principal fiber bundle. Gauge theories are reformulated within this algebraic framework and further generalized to unify ordinary connections and Higgs fields. A 'noncommutative Maxwell' model is built starting from non trivial fiber bundles thus requiring the development of the notion of Riemannian structure. The tools involved in the study of associative algebras are presented and an algebraic method to characterize the usual Chern-Weil morphism is proposed. Then, current results on symmetric fiber bundles are generalized to noncommutative connections and an extension of the Witten ansatz is given. Finally, a generalization of the Born-Infeld action for noncommutative connections is proposed. The corresponding Lagrangians are non-polynomial and the existence of solitonic solutions is shown on several examples

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