Gauge fields on noncommutative geometries with curvature

Details Gauge fields on noncommutative geometries with curvature Gauge fields on noncommutative geometries with curvature

2010-03-11

arxiv.org/abs/1003.2284v1

Physics

High Energy Physics

High Energy Physics - Theory

18 pages

Scientific paper

It was shown recently that the lagrangian of the Grosse-Wulkenhaar model can be written as lagrangian of the scalar field propagating in a curved noncommutative space. In this interpretation, renormalizability of the model is related to the interaction with the background curvature which introduces explicit coordinate dependence in the action. In this paper we construct the $U_1$ gauge field on the same noncommutative space: since covariant derivatives contain coordinates, the Yang-Mills action is again coordinate dependent. To obtain a two-dimensional model we reduce to a subspace, which results in splitting of the degrees of freedom into a gauge and a scalar. We define the gauge fixing and show the BRST invariance of the quantum action.

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