35 citations · 82 across the 11 of their papers we have counts for
11 papers
Structural morphology and the gravitational arrow of time
Julian Barbour, Francisco S. N. Lobo, Maria I. R. Lourenço
The Newtonian -body problem in the zero-energy, zero-linear-momentum, and zero-angular-momentum sector provides a time-reversal-invariant setting in which generic complete solut…
Scale Invariance, Variety and Central Configurations
Maria I. R. Lourenço, Julian Barbour, Francisco S. N. Lobo
Scale invariance has received very little attention in physics. Nevertheless, it provides a natural conceptual foundation for a relational understanding of the universe, where abso…
Timelike Entanglement Entropy of Hawking Radiation
Yahya Ladghami, Francisco S. N. Lobo, Taoufik Ouali
We introduce the concept of timelike entanglement entropy of Hawking radiation as a novel probe of the black hole information paradox. By analytically continuing black hole spaceti…
The Emergence of Measured Geometry in Self-Gravitating Systems
Maria I. R. Lourenço, Julian Barbour, Francisco S. N. Lobo
This work investigates the geometrical properties of self-gravitating -body systems from the perspective established by Henri Poincaré and Albert Einstein concerning the operati…
Spin effects on particle creation and evaporation in gravity
A. A. Araújo Filho, N. Heidari, Francisco S. N. Lobo
In this work, we study how the spin of particle modes influences particle creation, greybody factors, absorption, and evaporation of a black hole within the framework of modified e…
Sculpting Spacetime: Thin Shells in Wormhole Physics
Francisco S. N. Lobo
In this work, we employ the Darmois-Israel thin-shell formalism to construct both static and dynamic thin-shell configurations surrounding traversable wormholes. Initially, using t…
Wormhole geometries in gravity satisfying the energy conditions
Nailya Ganiyeva, João Luís Rosa, Francisco S. N. Lobo
We explore the properties of traversable wormhole spacetimes within the framework of energy-momentum squared gravity, also known as gravity, where represents the Ric…
Vector wormholes as conduits for matter interaction
Nailya Ganiyeva, Bruno J. Barros, Álvaro de la Cruz-Dombriz +1
In this work, we focus on the dynamics of a massive one-form field, \textbf{B}, often referred to simply as a vector field, that is minimally coupled to standard Einstein gravity.…
Energy-Momentum Squared Gravity: A Brief Overview
Ricardo A. C. Cipriano, Nailya Ganiyeva, Tiberiu Harko +3
In this work, we present a review of Energy-Momentum Squared Gravity (EMSG) -- more specifically, gravity, where represents the Ricci scalar and de…
Observational imprints of gravastars from accretion disks and hot-spots
João Luís Rosa, Daniela S. J. Cordeiro, Caio F. B. Macedo +1
In this work, we analyze the observational properties of thin-shell gravastars under two astrophysical frameworks, namely surrounded by optically-thin accretion disks and orbited b…
Non-exotic traversable wormholes in gravity
João Luís Rosa, Nailya Ganiyeva, Francisco S. N. Lobo
In this work we analyze traversable wormhole spacetimes in the framework of a covariant generalization of Einstein's General Relativity known as energy-momentum squared gravity, or…