{\Lambda}CDM suitably embedded in f(R) with a non-minimal coupling to matter
In: Addi. Archivo Digital para la Docencia y la Investigación instname Addi: Archivo Digital para la Docencia y la Investigación Universidad del País Vasco European Physical Journal C: Particles and Fields, Jg. 81 (2021), Heft 3, S. 1-10
Online
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Zugriff:
In this work, we further study a metric modified theory of gravity which contains a non-minimal coupling to matter, more precisely, we assume two functions of the scalar curvature, $f_1$ and $f_2$, where the first one generalises the Hilbert-Einstein action, while the second couples to the matter Lagrangian. On the one hand, assuming a $\Lambda$CDM background, we calculate analytical solutions for the functions $f_1$ and $f_2$. We consider two setups: on the first one, we fix $f_2$ and compute $f_1$ and on the second one, we fix $f_1$ and compute $f_2$. Moreover, we do the analysis for two different energy density contents, a matter dominated universe and a general perfect fluid with a constant equation of state fuelling the universe expansion. On the other hand, we complete our study by performing a cosmographic analysis for $f_1$ and $f_2$. We conclude that the gravitational coupling to matter can drive the accelerated expansion of the universe.
Comment: 10 pages, 2 figures. To appear in EPJC
Titel: |
{\Lambda}CDM suitably embedded in f(R) with a non-minimal coupling to matter
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Autor/in / Beteiligte Person: | Lazkoz, Ruth ; Bouhmadi-López, Mariam ; Ortiz-Baños, María ; Salzano, Vincenzo |
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Zeitschrift: | Addi. Archivo Digital para la Docencia y la Investigación instname Addi: Archivo Digital para la Docencia y la Investigación Universidad del País Vasco European Physical Journal C: Particles and Fields, Jg. 81 (2021), Heft 3, S. 1-10 |
Veröffentlichung: | 2021 |
Medientyp: | unknown |
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