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From BPS geodesics to mode-driven dynamics in the scattering of multiple BPS vortices

A. Alonso Izquierdo1,2, M. Bachmaier3,4, and A. Wereszczynski5,6

Phys. Rev. D 114, 015015 – Published 9 July, 2026

DOI: https://doi.org/10.1103/rpzh-fx62

Abstract

We analyze how the geodesic motion in the three- and four-vortex sectors of the Abelian-Higgs model at critical coupling is deformed by the excitation of a massive bound mode. We find that the geodesics corresponding to Bogomol’nyi-Prasad-Sommerfield (BPS) solutions with enhanced symmetry remain unchanged, although the direction of the actual motion depends on the mode-generated force, i.e., a force arising from the change of the mode frequency along the geodesic. In a generic case, for example, in head-on collisions between the axially symmetric one- and two-vortex or between two two-vortices, the vortex trajectories can differ strongly from the BPS geodesic. This enhances the chaotic behavior in the formation of the final state.

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