Abstract
We study self-dual SU(N) gauge field configurations on the 4 torus with twisted boundary conditions, known as fractional instantons. Focusing on the minimum non-zero action case, we generalize the constant field strength solutions discovered by ‘t Hooft and valid for certain geometries. For the general case, we construct the vector potential and field strength in a power series expansion in a deformation parameter of the metric. The next to leading term is explicitly computed. The methodology is an extension of that used by the author for SU(2) fractional instantons and for vortices in two-dimensional Abelian Higgs models. Obviously, these solutions can also be seen as self-dual configurations in ℝ4 having a crystal structure, where each node of the crystal carries a topological charge of 1/N .
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ArXiv ePrint: 1910.12565
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González-Arroyo, A. Constructing SU(N) fractional instantons. J. High Energ. Phys. 2020, 137 (2020). https://doi.org/10.1007/JHEP02(2020)137
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DOI: https://doi.org/10.1007/JHEP02(2020)137