76 citations · 315 across the 17 of their papers we have counts for
18 papers
On the total derivative divergence for a nonminimal vector operator
Thomas M. Sangy, Tibério de Paula Netto, Ilya L. Shapiro
We report on the calculation of the total derivative term in the divergence of vacuum effective action for the nonminimal vector field operator in a curved space backgroun…
Regular multi-horizon Lee-Wick black holes
Nicolò Burzillà, Breno L. Giacchini, Tibério de Paula Netto +1
In this paper we carry out a detailed analysis of the static spherically symmetric solutions of a sixth-derivative Lee-Wick gravity model in the effective delta source approximatio…
On effective models of regular black holes inspired by higher-derivative and nonlocal gravity
Tibério de Paula Netto, Breno L. Giacchini, Nicolò Burzillà +1
In this work we study static spherically symmetric solutions of effective field equations related to local and nonlocal higher-derivative gravity models, based on their associated…
Regular black holes from higher-derivative effective delta sources
Breno L. Giacchini, Tibério de Paula Netto
Certain approaches to quantum gravity and classical modified gravity theories result in effective field equations in which the original source is substituted by an effective one. I…
Renormalizability of nonlocal quantum gravity coupled to matter
Gianluca Calcagni, Breno L. Giacchini, Leonardo Modesto +2
We extensively study the ultraviolet quantum properties of a nonlocal action for gravity nonminimally coupled to matter. The theory unifies matter and gravity in an action principl…
Black holes in non-local gravity
Luca Buoninfante, Breno L. Giacchini, Tibério de Paula Netto
In this chapter we present a status report of black hole-like solutions in non-local theories of gravity in which the Lagrangians are at least quadratic in curvature and contain sp…
Stringballs and Planckballs for Dark Matter
Zhongyou Mo, Tibério de Paula Netto, Nicolò Burzillà +1
As a follow up of the seminal work by Guiot, Borquez, Deur, and Werner on "Graviballs and Dark Matter", we explicitly show that contrary to Einstein's gravity, in string theory, lo…
The running vacuum in effective quantum gravity
Breno L. Giacchini, Tibério de Paula Netto, Ilya L. Shapiro
We briefly review the previous works on the renormalization group in quantum general relativity with the cosmological constant, based on the Vilkovisky and DeWitt version of effect…
Effective quantum gravity, cosmological constant and the Standard Model of particle physics
Breno L. Giacchini, Tibério de Paula Netto, Ilya L. Shapiro
The renormalization group in effective quantum gravity can be consistently formulated using the Vilkovisky and DeWitt version of effective action and assuming a non-zero cosmologic…
Universal leading quantum correction to the Newton potential
Tibério de Paula Netto, Leonardo Modesto, Ilya L. Shapiro
The derivation of effective quantum gravity corrections to Newton's potential is an important step in the whole effective quantum field theory approach. We hereby add new strong ar…
Gauge and parametrization ambiguity in quantum gravity
Jeferson D. Gonçalves, Tibério de Paula Netto, Ilya L. Shapiro
The gauge and parametrization dependence is discussed in quantum gravity in an arbitrary dimension . Explicit one-loop calculations are performed within the most general paramet…
One-loop renormalization of Lorentz/CPT violating scalar field theory in curved space-time
Tibério de Paula Netto
The one-loop divergences for the scalar field theory with Lorentz and/or CPT breaking terms are obtained in curved space-time. We analyze two separate cases: minimal coupled scalar…
Massive vector field on curved background: non-minimal coupling, quantization and divergences
Ioseph L. Buchbinder, Tibério de Paula Netto, Ilya L. Shapiro
We study the effective action for the massive vector field theory non-minimally coupled to external gravitational field. Such a theory is an interesting model both from the theoret…
Non-local form factors for curved-space antisymmetric fields
Tiberio de Paula Netto, Ilya L. Shapiro
In the recent paper Buchbinder, Kirillova and Pletnev presented formal arguments concerning quantum equivalence of free massive antisymmetric tensor fields of second and third rank…
From stable to unstable anomaly-induced inflation
Tiberio de Paula Netto, Ana M. Pelinson, Ilya L. Shapiro +1
Quantum effects derived through conformal anomaly lead to an inflationary model that can be either stable or unstable. The unstable version requires a large dimensionless coefficie…
On Newtonian singularities in higher derivative gravity models
Leonardo Modesto, Tibério de Paula Netto, Ilya L. Shapiro
We consider the problem of Newtonian singularity in the wide class of higher derivative gravity models, including the ones which are renormalizable and super-renormalizable at the…
Vacuum contribution of photons in the theory with Lorentz and CPT-violating terms
Tiberio de Paula Netto, Ilya L. Shapiro
The photon contribution to the divergences and conformal anomaly in the theory with Lorentz and CPT-violating terms is evaluated. We calculate one-loop counterterms coming from the…
One-loop divergences in the Galileon model
Tiberio de Paula Netto, Ilya L. Shapiro
The investigation of UV divergences is a relevant step in better understanding of a new theory. In this work the one-loop divergences in the free field sector are obtained for the…