Abstract
We have investigated the head-on collision of a two-kink and a two-antikink pair that arises as a generalization of the ϕ 4 model. We have evolved numerically the Klein-Gordon equation with a new spectral algorithm whose accuracy and convergence were attested by the numerical tests. As a general result, the two-kink pair is annihilated radiating away most of the scalar field. It is possible the production of oscillons-like configurations after the collision that bounce and coalesce to form a small amplitude oscillon at the origin. The new feature is the formation of a sequence of quasi-stationary structures that we have identified as lump-like solutions of non-topological nature. The amount of time these structures survives depends on the fine-tuning of the impact velocity.
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Mendonça, T., de Oliveira, H. The collision of two-kinks defects. J. High Energ. Phys. 2015, 120 (2015). https://doi.org/10.1007/JHEP09(2015)120
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DOI: https://doi.org/10.1007/JHEP09(2015)120