Gauge Bundles and Born-Infeld on the Noncommutative Torus

Details Gauge Bundles and Born-Infeld on the Noncommutative Torus Gauge Bundles and Born-Infeld on the Noncommutative Torus

1998-10-27

arxiv.org/abs/hep-th/9810219v2

Nucl.Phys. B547 (1999) 157-178

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, LaTeX2e. Small errors corrected

Scientific paper

10.1016/S0550-3213(99)00062-0

In this paper, we describe non-abelian gauge bundles with magnetic and electric fluxes on higher dimensional noncommutative tori. We give an explicit construction of a large class of bundles with nonzero magnetic 't Hooft fluxes. We discuss Morita equivalence between these bundles. The action of the duality is worked out in detail for the four-torus. As an application, we discuss Born-Infeld on this torus, as a description of compactified string theory. We show that the resulting theory, including the fluctuations, is manifestly invariant under the T-duality group SO(4,4;Z). The U-duality invariant BPS mass-formula is discussed shortly. We comment on a discrepancy of this result with that of a recent calculation.

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