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|Title:||Degenerate vacua to vacuumless model and kink–antikink collisions|
|Authors:||SIMAS, Fabiano de Carvalho|
GOMES, Adalto R.
NOBREGA, K. N.
|Citation:||SIMAS, F. C.; GOMES, A. R.; NOBREGA, K. Z. Degenerate vacua to vacuumless model and kink–antikink collisions. Physics Letters B, v. 775, p. 290-296, 2017. DOI: https://doi.org/10.1016/j.physletb.2017.11.013|
|Abstract:||In this work we investigate a Z2 symmetric model of one scalar field ϕ in (1,1) dimension. The model is characterized by a continuous transition from a potential V(ϕ) with two vacua to the vacuumless case. The model has kink and antikink solutions that minimize energy. Stability analysis is described by a Schrödinger-like equation with a potential that transits from a volcano-shape with no vibrational states (in the case of vacuumless limit) to a smooth valley with one vibrational state. We are interested in the structure of two-bounce windows present in kink–antikink scattering processes. The standard mechanism of Campbell–Schonfeld–Wingate (CSW) requires the presence of one vibrational state for the occurrence of two-bounce windows. We report that the effect of increasing the separation of vacua from the potential V(ϕ) has the consequence of trading some of the first two-bounce windows predicted by the CSW mechanism by false two-bounce windows. Another consequence is the appearance of false two-bounce windows of zero-order.|
|Appears in Collections:||Artigos - Engenharia Agrícola|
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