Tuesday, May 28, 2013

1305.6185 (Ludwik Dabrowski et al.)

Dirac operator on noncommutative principal circle bundles    [PDF]

Ludwik Dabrowski, Andrzej Sitarz, Alessandro Zucca
We study spectral triples over noncommutative principal U(1)-bundles of arbitrary dimension and formulate a compatibility condition between the connection and the Dirac operator on the total space and on the base space of the bundle. Examples of low dimensional noncommutative tori are analyzed in more detail and all connections found that are compatible with an admissible Dirac operator. Conversely, a family of new Dirac operators on the noncommutative tori, which arise from the base-space Dirac operator and a suitable connection is exhibited. These examples are extended to the theta-deformed principal U(1)-bundle S^3_\theta -> S^2.
View original: http://arxiv.org/abs/1305.6185

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