FLRW-Cosmology in Generic Gravity Theories

Abstract

We prove that for the Friedmann-Lemaitre-Robertson-Walker metric, the field equations of any generic gravity theory in arbitrary dimensions are of the perfect fluid type. The cases of general Lovelock and $\mathcal{F}(R,\mathcal{G})$ theories are given as examples.

arXiv comment9 pages, published version in Eur. Phys. J. C

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Cited by in corpus (10)

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• Multi-fluid cosmology in Einstein gravity: analytical solutions
• The interacting vacuum and tensions: a comparison of theoretical models
• Big Bang in Dipole Cosmology
• Cosmology with Higher-Derivative Gravities
• Impact of projective curvature tensor in $f\left(R,G\right)$, $f\left(R,T\right)$ and $f\left(R,L_m\right)$-gravity
• Dynamical Wormhole Solutions in $f(R,T)$ Gravity
• Cosmology of fractional gravity
• A new approach to the thermodynamics of scalar-tensor gravity