Non-trivial flat connections on the 3-torus I: G_2 and the orthogonal groups

Details Non-trivial flat connections on the 3-torus I: G_2 and the orthogonal groups Non-trivial flat connections on the 3-torus I: G_2 and the orthogonal groups

1999-01-28

arxiv.org/abs/hep-th/9901154v1

JHEP 9905:001,1999

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 29 pages, 3 figures

Scientific paper

10.1088/1126-6708/1999/05/001

We propose a construction of non-trivial vacua for Yang-Mills theories on the 3-torus. Although we consider theories with periodic boundary conditions, twisted boundary conditions play an essential auxiliary role in our construction. In this article we will limit ourselves to the simplest case, based on twist in SU(2) subgroups. These reproduce the recently constructed new vacua for SO(N) and G_2 theories on the 3-torus. We show how to embed the results in the other exceptional groups F_4 and E_{6,7,8} and how to compute the relevant unbroken subgroups. In a subsequent article we will generalise to SU(N > 2) subgroups. The number of vacua found this way exactly matches the number predicted by the calculation of the Witten index in the infinite volume.

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