Exotic Final States in the ${\phi }^8$ Multi-Kink Collisions

Abstract

We study final states in the scattering of kinks and antikinks of the ${\phi }^8$ field-theoretic model. We use the initial conditions in the form of two, three or four static or moving kinks. In the numerical experiments we observe a number of different processes such as emergence of static and moving oscillons, change of the kink's topological sector, scattering of an oscillon by a kink, production of kink-antikink pairs in oscillon-oscillon collisions. In antikink-kink collisions for asymmetric kinks, we found resonance phenomena -- escape windows.

13 pages, 7 figures; v2: final/published version