4 papers · 1 filter
Cosmological dynamics of interacting dark matter-dark energy in generalized Rastall gravity
Manuel Gonzalez-Espinoza, Ramón Herrera, Giovanni Otalora +2
In this work, we investigate late-time interacting cosmologies within the framework of generalized Rastall gravity, where the interaction arises naturally from the non-conservation…
Interacting dilatonic ghost condensate as dark energy model
Manuel Gonzalez-Espinoza, Ramón Herrera
In this paper, we examine the cosmological evolution of a dilatonic ghost condensate field responsible for dark energy, which interacts with dark matter through a source term. We e…
Constant-roll inflation with a complex scalar field
Ramón Herrera, Mehdi Shokri, Jafar Sadeghi
We consider inflation with a constant rate of rolling in which a complex scalar field plays the role of inflaton during the inflationary epoch. We implement the inflationary analys…
Inflation in a scalar-vector gravity theory
Manuel Gonzalez-Espinoza, Ramon Herrera
We study the possibility that inflation is driven by a scalar field together with a vector field minimally coupled to gravity. By assuming an effective potential that incorporates…