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Fermionic spectral walls in kink collisions

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arxiv 2211.07754 v3 pith:7HU6PCDD submitted 2022-11-14 hep-th nlin.PS

Fermionic spectral walls in kink collisions

Jo\~ao G. F. Campos , Azadeh Mohammadi , Jose M. Queiruga , Andrzej Wereszczynski , W. J. Zakrzewski This is my paper
classification hep-th nlin.PS
keywords spectralwallbosonicfermionickinkstatearisesbefore
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We show that a spectral wall, i.e., an obstacle in the dynamics of a bosonic soliton, which arises due to the transition of a normal mode into the continuum spectrum, exists after coupling the original bosonic model to fermions. This spectral wall can be experienced if the boson or fermion field is in an excited state. Furthermore, while passing through a spectral wall, an incoming kink-fermion bound state can be separated into purely bosonic kink, which continues to move to spatial infinity and a fermionic cloud that spreads in the region before the wall.

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  1. Compact structures in impurity-doped vacuumless systems

    hep-th 2026-05 unverdicted novelty 5.0

    Impurities preserving half the BPS sectors induce compact or half-compact stable vacuumless kinks in scalar models, which cannot form in impurity-free canonical cases.