Cosmological dynamics in interacting scalar-torsion f (T,φ) gravity: Investigating energy and momentum couplings

Rodriguez-Benites C.; Gonzalez-Espinoza M.; Otalora G.; Alva-Morales M. · Physical Review D (2025) · DOI: 10.1103/physrevd.111.043506

Resumen

We investigate the cosmological dynamics of a homogeneous scalar field nonminimally coupled to torsion gravity, which also interacts with cold dark matter through energy and momentum transfer. The matter and radiation perfect fluids are modeled using the Sorkin-Schutz formalism. We identify scaling regimes of the field during both the radiation and matter eras. Additionally, we discovered a field-dominated scaling attractor; however, it does not exhibit accelerated expansion, making it unsuitable for describing dark energy. Nevertheless, we find two attractor solutions that do exhibit accelerated expansion: one is a quintessencelike fixed point, and the other is a de Sitter fixed point.

Instituciones: Universidad Nacional de Trujillo