f(G) modified gravity and the energy conditions

Abstract

Motivated by string/M-theory predictions that scalar field couplings with the Gauss-Bonnet invariant, G, are essential in the appearance of non-singular early time cosmologies, we discuss the viability of an interesting alternative gravitational theory, namely, modified Gauss-Bonnet gravity, and present the viability bounds arising from the energy conditions. In particular, we consider a specific realistic form of f(G) analyzed in the literature that accounts for the late-time cosmic acceleration and that has been found to cure the finite-time future singularities present in the dark energy models, and further examine the respective viability of the specific f(G) model imposed by the weak energy condition.

4 pages. Prepared for the proceedings of the Spanish Relativity meeting (ERE2010), Granada, Spain, 6-10 Sep 2010

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Cited by in corpus (22)

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• Analysis of F(R,T) Gravity Models Through Energy Conditions
• Charged Gravastars in Modified Gravity
• Physical Attributes of Anisotropic Compact Stars in $f(R,G)$ Gravity
• On the non-attractive character of gravity in f(R) theories
• Stellar Structures in $f(\mathcal{G})$ Gravity with Tolman-Kuchowicz Spacetime
• Analysis of Charged Compact Stars in Modified Gravity
• Impact of Tolman-Kuchowicz Potentials on Gauss-Bonnet Gravity and Isotropic Stellar Structures
• Massive Compact Bardeen Stars with Conformal Motion
• Dynamical Analysis of Self-gravitating Stars in Modified Gauss-Bonnet Gravity
• Energy Bounds in $f(R,G)$ Gravity with Anisotropic Background
• Constraining $f(T,B)$ teleparallel gravity from energy conditions
• Energy conditions in f(T) gravity with higher-derivative torsion terms
• Anisotropic Universe in $f(\mathcal{G},\text{T})$ Gravity
• Compact relativistic geometries in $f(R,G)$ gravity
• Gödel-type solutions within the $f(R,Q,P)$ gravity
• Cosmological constant constraints from observation-derived energy condition bounds and their application to bimetric massive gravity
• Inflation and cosmological evolution with $F(R,G)$ gravity theory
• Phenomenological models of Universe with varying $G$ and $\Lambda$
• Energy Conditions in Extended $f(R,G,T)$ Gravity
• Energy Conditions in $f(P)$ Gravity
• Conflict between some higher-order curvature invariant terms