Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.091602
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Funding
- STFC
- CNRS
- A. von Humboldt Foundation
- STFC [ST/I505648/1, ST/J000426/1, ST/G000433/1, ST/J501001/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J501001/1, ST/G000433/1, ST/I505648/1, ST/J000426/1] Funding Source: researchfish
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We study kink-antikink collisions in the one-dimensional nonintegrable scalar phi(6) model. Although the single-kink solutions for this model do not possess an internal vibrational mode, our simulations reveal a resonant scattering structure, thereby providing a counterexample to the standard belief that the existence of such a mode is a necessary condition for multibounce resonances in general kink-antikink collisions. We investigate the two-bounce windows in detail, and present evidence that this structure is caused by the existence of bound states in the spectrum of small oscillations about a combined kink-antikink configuration.
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