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Fermionic spectral walls in kink collisions

Campos, J.G.F.; Mohammadi, A.; Queiruga, J.M.; Wereszczynski, A.; Zakrzewski, W.J.

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J.G.F. Campos

A. Mohammadi

J.M. Queiruga

A. Wereszczynski

W.J. Zakrzewski


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.


Campos, J., Mohammadi, A., Queiruga, J., Wereszczynski, A., & Zakrzewski, W. (2023). Fermionic spectral walls in kink collisions. Journal of High Energy Physics, 2023, Article 71 (2023).

Journal Article Type Article
Acceptance Date Dec 22, 2022
Online Publication Date Jan 16, 2022
Publication Date 2023
Deposit Date Apr 18, 2023
Publicly Available Date Apr 18, 2023
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2023
Article Number 71 (2023)


Published Journal Article (Advance online version) (498 Kb)

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Copyright Statement
Advance online version This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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