4 papers
Low-energy limit in the anomaly-induced action and the semiclassical cosmological bounce
Wagno Cesar e Silva, Nicolas R. Bertini, Ilya L. Shapiro
In the recently proposed scenario, the cosmological bounce occurs because the initially contracting Universe is not empty. In the region close to singularity, matter contents of th…
Post-Newtonian expansion of scale-dependent gravity
Nicolas R. Bertini, Marcos H. Novaes
Scale-dependent gravity is an extension of general relativity in which the Newton and cosmological constants may vary slightly with the energy scale due to remnant low-energy quant…
Renormalization group corrections to CDM model and observational consequences for tension
Nicolas R. Bertini, Marcos H. Novaes, Rodrigo von Marttens +1
We explore the renormalization group-based extension of the CDM model as a potential solution to the current cosmological tensions. In this approach, both the cosmological cons…
Scale-dependent gravity and covariant scale-setting
Nicolas R. Bertini
A fundamental element of scale-dependent gravity is the scale-setting procedure. We present a new covariant expression to set the scale that arises when examining the field equatio…