Symmetric multifield oscillons
van Dissel, Fabio (Institut de Física d'Altes Energies)
Sfakianakis, Evangelos I. (Leiden University)

Data:	2022
Resum:	Oscillons are long-lived, spatially localized field configurations, which are supported by attractive nonlinearities in the scalar potential. We study oscillons comprised of multiple interacting fields, each having an identical potential with quadratic, quartic and sextic terms. We consider quartic interaction terms of either attractive or repulsive nature. In the two-field case, we construct semianalytical oscillon profiles for different values of the potential parameters and coupling strength using the two-timing small-amplitude formalism. We use analytical and numerical techniques to explore the basin of attraction of stable oscillon solutions and show that, depending on the initial perturbation size, unstable oscillons can either completely disperse or relax to the closest stable configuration. We generalize our analysis to multifield oscillons and show that the governing equations for their shape and stability can be mapped to the ones arising in the two-field case. Finally, we study the emergence of multicomponent oscillons in one and three spatial dimensions, both numerically and through Floquet theory.
Ajuts:	"la Caixa" Foundation 100010434 European Commission 847648 Ministerio de Ciencia e Innovación PRE2020-094420
Nota:	Altres ajuts: CERCA Programme/Generalitat de Catalunya
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Classical solutions in field theory ; Hypothetical particle physics models ; Inflation ; Pattern formation ; Solitons ; Breathers ; Coherent structures ; Multiple time scale dynamics
Publicat a:	Physical Review D, Vol. 106, Issue 9 (November 2022) , art. 096018, ISSN 2470-0029

DOI: 10.1103/PhysRevD.106.096018

25 p, 4.2 MB

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