Speaker
Description
Motivated by the work of Saridakis, in this talk we report the phenomenology of Barrow holographic dark energy using the Granda-Oliveros infrared cutoff. The latter is a holographic dark energy model based on the recently proposed Barrow entropy, which arises from the modification of the black-hole surface due to quantum-gravitational effects, quantified by a new parameter $\Delta$. In order to analyze this new scenario we also consider a flat, homogeneous and isotropic universe, modeling it’s content as a perfect fluid. We extract a differential equation for the evolution of $H^{2}$ and calculate the quantities associated with dark energy models. We show that this scenario can reproduce an accelerated expansion and describe the universe's thermal history, with the sequence of matter and dark energy eras. Additionally, we show that the new Barrow exponent $\Delta$ significantly affects the dark energy equation of state, and according to it’s value it can lead it to lie in diferentes regimes.
