126 citations · 296 across the 12 of their papers we have counts for
7 papers · 1 filter
Cosmological consequences of scale-dependent Barrow-Tsallis entropy
Giuseppe Gaetano Luciano, Orlando Luongo, Marco Muccino
We investigate an extended cosmological scenario based on the Barrow-Tsallis entropy, incorporating a varying (i.e., energy-scale-dependent) anomalous dimension. This behavior is r…
Gravitational metamaterials from optical properties of spacetime media
Orlando Luongo
Gravitational optical properties are here investigated under the hypothesis of spherically-symmetric spacetimes behaving as media. To do so, we first consider two different definit…
Superhorizon entanglement from inflationary particle production
Alessio Belfiglio, Orlando Luongo, Stefano Mancini
We investigate entanglement generation between the sub- and super-Hubble modes of inflaton fluctuations, in the context of particle production from perturbations during inflation.…
De Sitter-like configurations with asymptotic quintessence environment
Roberto Giambò, Orlando Luongo
We examine a spherically-symmetric class of spacetimes carrying vacuum energy, while considering the influence of an external dark energy environment represented by a non-dynamical…
Repulsive gravity in regular black holes
Orlando Luongo, Hernando Quevedo
We evaluate the effects of repulsive gravity using first order geometric invariants, \textit{i.e.}, the Ricci scalar and the eigenvalues of the Riemann curvature tensor, for three…
Red and blue shift in spherical and axisymmetric spacetimes and astrophysical constraints
Roberto Giambò, Orlando Luongo, Lorenza Mauro
We compute the red and blue shifts for astrophysical and cosmological sources. In particular, we consider low, intermediate and high gravitational energy domains. Thereby, we handl…
Entanglement in model independent cosmological scenario
Orlando Luongo, Stefano Mancini
We propose a \emph{model-independent} approach to study entanglement creation due to the dynamics between two asymptotic quantum regimes in the framework of homogeneous and isotrop…