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Título: | Finite-time future singularities in modified Gauss–Bonnet and ℱ(R,G) gravity and singularity avoidance |
Autor: | Bamba, Kazuharu; Odintsov, Sergei D. CSIC ORCID; Sebastiani, Lorenzo; Zerbini, Sergio | Fecha de publicación: | 27-mar-2010 | Editor: | Springer Nature | Citación: | European Physical Journal C - Particles and Fields 67 (1-2) : 295-310 (2010) | Resumen: | We study all four types of finite-time future singularities emerging in the late-time accelerating (effective quintessence/phantom) era from ℱ(R,G)-gravity, where R and G are the Ricci scalar and the Gauss–Bonnet invariant, respectively. As an explicit example of ℱ(R,G)-gravity, we also investigate modified Gauss–Bonnet gravity, so-called F(G)-gravity. In particular, we reconstruct the F(G)-gravity and ℱ(R,G)-gravity models where accelerating cosmologies realizing the finite-time future singularities emerge. Furthermore, we discuss a possible way to cure the finite-time future singularities in F(G)-gravity and ℱ(R,G)-gravity by taking into account higher-order curvature corrections. The example of non-singular realistic modified Gauss–Bonnet gravity is presented. It turns out that adding such non-singular modified gravity to singular Dark Energy makes the combined theory a non-singular one as well. | Descripción: | The final publication is available at www.springerlink.com | Versión del editor: | http://dx.doi.org/10.1140/epjc/s10052-010-1292-8 | URI: | http://hdl.handle.net/10261/38205 | DOI: | 10.1140/epjc/s10052-010-1292-8 | ISSN: | 1434-6044 | E-ISSN: | 1434-6052 |
Aparece en las colecciones: | (ICE) Artículos |
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