Abstract
We study kink-antikink collisions in a model which interpolates smoothly between the completely integrable sine-Gordon theory, the ϕ4 model, and a ϕ6-like model with three degenerate vacua. We find a rich variety of behaviours, including integrability breaking, resonance windows with increasingly irregular patterns, and new types of windows near the ϕ6-like regime. False vacua, extra kink modes and kink fragmentation play important roles in the explanations of these phenomena. Our numerical studies are backed up by detailed analytical considerations.
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Dorey, P., Gorina, A., Perapechka, I. et al. Resonance structures in kink-antikink collisions in a deformed sine-Gordon model. J. High Energ. Phys. 2021, 145 (2021). https://doi.org/10.1007/JHEP09(2021)145
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DOI: https://doi.org/10.1007/JHEP09(2021)145