1 citations · 1 across the 5 of their papers we have counts for
6 papers
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…
Null Raychaudhuri Equation and the Impossibility of Traversable Wormholes in Unimodular Gravity
Erick Pastén, Marco Bosquez, Norman Cruz
We formulate the traversability of wormhole throats as a local and covariant null defocusing condition derived from the Raychaudhuri equation. Since unimodular gravity preserves th…
Covariant interpretation of proper infall times in Kerr spacetime
Erick Pasten, Claudia Alvarez, Norman Cruz
We investigate proper infall times in the Schwarzschild and Kerr spacetimes from a covariant perspective, focusing on the role of black--hole rotation in the focusing properties of…
Bulk viscous cosmological models with a cosmological constant: Observational constraints
R. Noemà Villalobos, Yerko Vásquez, Norman Cruz +1
We investigate whether viscous cold dark matter (vCDM) in a -dominated FLRW universe can alleviate the Hubble tension while satisfying thermodynamic constraints, examining both…
Dissipative Unimodular Gravity: Linking Energy Diffusion to Bulk Viscosity as an Alternative to CDM under DESI DR2 Data
Norman Cruz, Esteban González, Guillermo Palma
In this paper, we perform a theoretical and observational study of the presence of viscosity in the Unimodular Gravity formalism, a pioneering approach that, to the best of our kno…
Exploring thermodynamics inconsistencies in unimodular gravity: a comparative study of two energy diffusion functions
Miguel Cruz, Norman Cruz, Samuel Lepe
In this work we study the thermodynamics formulation for unimodular gravity under the election of two different models for the energy diffusion function. Such function encodes the…