9 citations · 31 across the 13 of their papers we have counts for
7 papers · 1 filter
Gravitational entropy of wormholes with exotic matter and in galactic halos
R. de C. Lima, José A. C. Nogales, S. H. Pereira
In this work we study and compare the features of gravitational entropy near the throat of transversable wormholes formed by exotic matter and wormholes in galactic halos. We have…
Quantization of the interior of the black hole
Laysa G. Martins, K. Luz-Burgoa, José A. C. Nogales
In this work we study the Schwarzschild metric in the context of canonical quantum gravity inside the horizon, close of horizon and near the black hole singularity. Using this stan…
Cosmology from a Lagrangian formulation for Rastall's theory
Renato Vieira dos Santos, José A. C. Nogales
We give a Lagrangian formulation for the theory of Rastall of gravitation. After proposing a Lagrangian density that reproduces the equations of motion postulated by Rastall, we st…
Quantum Hořava-Lifshitz cosmology and the quantum nature of coupling corrections of HL gravity
Laysa G. Martins, José A. C. Nogales
In this work were studied quantum models of a Friedmann-Robertson-Walker (FRW) cosmology in the framework of the gravity's theory proposed by Hořava, the so-called Hořava-Lifshitz…
Non-Boltzmann Statistics as an Alternative to Holography
Marcelo Botta Cantcheff, Jose A. C. Nogales
An intriguing question related to black hole thermodynamics is that the entropy of a region shall scale as the area rather than the volume. In this essay we propose that the micros…
Instability of cosmological event horizons of nonstatic global cosmic strings II: perturbations of gravitational waves and massless scalar field
José A. C. Nogales, Anzhong Wang
The stability of the cosmological event horizons (CEHs) of a class of non-static global cosmic strings is studied against perturbations of gravitational waves and massless scalar f…
Instability of cosmological event horizons of non-static global cosmic strings
Anzhong Wang, Jose A. C. Nogales
The stability of the cosmological event horizons found recently by Gregory [Phys. Rev. D54, 4955 (1996)] for a class of non-static global cosmic strings is studied. It is shown tha…