Abstract
Topological defects carry a topological charge coming from the non-trivial boundary conditions. In the case of the kink, this charge is proportional to φ(x = +∞) − φ(x = -∞). For vortices, it is the total magnetic flux, ∫d 2 xB integrated in the plane perpendicular to the vortex, ’t Hooft-Polyakov magnetic monopoles carry a magnetic charge that can be related to the non-trivial “hedgehog” configuration of the Higgs field outside the monopole core.
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Achucarro, A. (2003). Vortices and Flat Directions: The Uses of Bogomolnyi Bounds. In: Arodz, H., Dziarmaga, J., Zurek, W.H. (eds) Patterns of Symmetry Breaking. NATO Science Series, vol 127. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1029-0_9
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