期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.241601
关键词
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资金
- Ministry of Education, Culture, and Sports, Spain [FPA2017-83814-P]
- Xunta de Galicia [INCITE09.296.035PR]
- Xunta de Galicia (Conselleria de Educacion)
- Spanish Consolider-Ingenio Programme CPAN [CSD2007-00042]
- FEDER
- Maria de Maetzu Unit of Excellence [MDM-2016-0692]
During defect-antidefect scattering, bound modes frequently disappear into the continuous spectrum before the defects themselves collide. This leads to a structural, nonperturbative change in the spectrum of small excitations. Sometimes the effect can be seen as a hard wall from which the defect can bounce off. We show the existence of these spectral walls and study their properties in the phi(4) model with Bogomol'nyiPrasad-Sommerfield preserving impurity, where the spectral wall phenomenon can be isolated because the static force between the antikink and the impurity vanishes. We conclude that such spectral walls should surround all solitons possessing internal modes.
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