Browsing by Author "Canales, Felipe"

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    Statefinder analysis of scale-dependent cosmology
    (2022) Alvarez, Pedro D.; Koch, Benjamin; Laporte, Cristobal; Canales, Felipe; Rincon, Angel
    We study the statefinder parameters of a cosmological model based on scale -dependent gravity. The effective Einstein field equations come from an average effective action. From the dynamical system, we derive analytical expressions that improve the con-vergence of the numerical solutions. We determine the statefinder parameters for moderate redshift and compare them with well-known alternatives to ACDM.
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    The effects of running gravitational coupling on three dimensional black holes
    (2023) Rincón, Ángel; Koch, Benjamin; Laporte, Cristobal; Canales, Felipe; Cruz, Norman
    In the present work, we investigate the consequences of running gravitational coupling on the properties of the three-dimensional BTZ black hole. We take as starting point the functional form of gravitational coupling obtained in the context of asymptotic safe gravity theory. By using the standard scale setting relation where $$k\sim \xi /r^n$$ k ∼ ξ / r n , we compute the solution of the Einstein field equations. We get and analyze the horizon and the thermodynamic properties of this new class of black hole solutions. The impact of the scale-dependent parameter $$\xi $$ ξ on the cosmological “constant” and metric functions are briefly discussed. We find that the null energy condition is also violated in this setup when scale-dependent gravity and Newton’s coupling (coming from the asymptotic safety scenario of gravity) are simultaneously taken into account.