6 papers
Static electric and magnetic traversable wormholes in -dimensional nonlinear electrodynamics
Mauricio Cataldo
Every traversable wormhole reported so far in static (2+1) gravity coupled to nonlinear electrodynamics has come from a power-Maxwell Lagrangian L propto |F|^k restricted to k=1/2,…
On the geometrical and dynamical distinction between Unimodular and General Relativistic wormholes
Marco Bosquez, Erick Pastén, Mauricio Cataldo +1
We characterize traversable wormholes in Unimodular Gravity (UG) and investigate what distinguishes them from their General Relativistic (GR) counterparts. For a class of static an…
Comment on Cosmological constraints on unimodular gravity models with diffusion (arXiv:2211.07424): thermodynamic inadmissibility of the H0 tension resolution mechanism
Mauricio Cataldo
We show that the diffusion-based models proposed in Refs.~\cite{Perez2021,Landau2022} within the framework of Unimodular Gravity (UG) to alleviate the tension are incompatibl…
On non-equatorial embeddings into of spherically symmetric wormholes with topological defects
Mauricio Cataldo, Daniel Cuevas
Traditionally, the embedding procedure for spherically symmetric spacetimes has been restricted to the equatorial plane . This conventional approach, however, encounters…
Could a thin-shell configuration lie hidden within the Universe?
Mauricio Cataldo, Antonella Cid, Pedro Labraña
This article explores the cosmological scenario in which our Universe contains a hidden thin-shell configuration. We investigate a degenerate modification of the Friedmann-Robertso…
Revisiting Wormhole Solutions in Unimodular Gravity: Energy Conditions and Exotic Matter Requirements
Mauricio Cataldo, Norman Cruz
The paper entitled Unimodular Gravity Traversable Wormholes by Agrawal et al. examined the properties of barotropic wormholes without tidal forces within the framework of Unimodula…