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Viscous Fluids and Gauss-Bonnet Modified Gravity · Around

2010

Viscous Fluids and Gauss-Bonnet Modified Gravity

Gorbunova, Olesya, Sebastiani, Lorenzo

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We study effects of cosmic fluids on finite-time future singularities in modified $f(R,G)$-gravity, where $R$ and $G$ are the Ricci scalar and the Gauss-Bonnet invariant, respectively.

We consider the fluid equation of state in the general form, $\omega=\omega(\rho)$, and we suppose the existence of a bulk viscosity.
We investigate quintessence region ($\omega>-1$) and phantom region ($\omega<-1$) and the possibility to change or avoid the singularities in $f(R,G)$-gravity.
Finally, we study the inclusion of quantum effects in large curvatures regime.

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