Emerging universe from scale invariance

Sergio Del Campo, Eduardo I. Guendelman, Ramón Herrera, Pedro Labraña

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

13 Citas (Scopus)

Resumen

We consider a scale invariant model which includes a R2 term in action and show that a stable "emerging universe" scenario is possible. The model belongs to the general class of theories, where an integration measure independent of the metric is introduced. To implement scale invariance (S.I.), a dilaton field is introduced. The integration of the equations of motion associated with the new measure gives rise to the spontaneous symmetry breaking (S.S.B) of S.I. After S.S.B. of S.I. in the model with the R2 term (and first order formalism applied), it is found that a non trivial potential for the dilaton is generated. The dynamics of the scalar field becomes non linear and these non linearities are instrumental in the stability of some of the emerging universe solutions, which exists for a parameter range of the theory.

Idioma originalInglés
Número de artículo026
PublicaciónJournal of Cosmology and Astroparticle Physics
Volumen2010
N.º6
DOI
EstadoPublicada - 2010
Publicado de forma externa

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