10 citations · 37 across the 9 of their papers we have counts for
8 papers · 1 filter
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…
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…
Scale-dependent cosmology from effective quantum gravity in the invariant framework
Nicolas R. Bertini, Davi C. Rodrigues, Ilya L. Shapiro
We explore the possibility of a consistent cosmology based on the gauge-fixing independent running of the gravitational and cosmological constants ( and ) in the framework of…
Primordial perturbations and inflation in a holography inspired Gauss-Bonnet cosmology
Nicolas R. Bertini, Neven Bilic, Davi C. Rodrigues
We consider an action for gravity that, in addition to the Einstein-Hilbert term, contains a function of the Ricci scalar and the Gauss-Bonnet invariant. The specific form of the f…
Primordial perturbations and inflation in holographic cosmology
Nicolas R. Bertini, Neven Bilic, Davi C. Rodrigues
We consider an inflationary scenario in the holographic braneworld with a cosmological fluid occupying the 3+1 dimensional brane located at the holographic boundary of an asymptoti…
Cosmological framework for renormalization group extended gravity at the action level
Nicolas R. Bertini, Wiliam S. Hipolito-Ricaldi, Felipe de Melo-Santos +1
General relativity (GR) extensions based on renormalization group (RG) flows may lead to scale-dependent couplings with nontrivial effects at large distance scales. Here we develop…
Will-Nordtvedt PPN formalism applied to renormalization group extensions of general relativity
Júnior D. Toniato, Davi C. Rodrigues, Álefe O. F. de Almeida +1
Here we apply the full Will-Nordtvedt version of the Parameterized Post-Newtonian (PPN) formalism to a class of General Relativity extensions that are based on nontrivial renormali…