12 papers
Thermodynamic Criticality in FLRW Cosmology with Non-extensive Loop Quantum Gravity Entropy
Miguel Cruz, Joel Saavedra, Juan Rodriguez
We investigate thermodynamic criticality in a spatially flat Friedmann-Lema\^ıtre-Robertson-Walker universe with a non-extensive Loop Quantum Gravity inspired entropy on its appare…
Curvature-induced phantom behavior and cosmological bounces without violating the Dominant Energy Condition
Miguel Cruz, Samuel Lepe
We show that a spatially closed universe can exhibit effective phantom dynamics () and reach a finite-time cosmological event without violating the Dominant Energy Condition…
Cosmological Stealth fields and Non-Equilibrium thermodynamics
Gilberto Aguilar-Pérez, Cuauhtemoc Campuzano, Víctor H. Cárdenas +2
We investigate the connection between cosmological stealth scalar fields and non-equilibrium thermodynamics in a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) backgroun…
Spatial curvature in Unimodular Gravity
Gilberto Aguilar-Pérez, Miguel Cruz, Samuel Lepe
We investigate the cosmological implications of unimodular gravity (UG) featuring energy diffusion and spatial curvature. While standard diffusion models often suffer from thermody…
Correspondence between a decaying dark matter sector scenario and scalar field model
Gilberto Aguilar-Pérez, Deryan Alvarado, Miguel Cruz +2
We explore the theoretical viability of modeling a decaying dark matter sector through a unified scalar field approach. Using exact analytical solutions of the Friedmann constraint…
Thermodynamic constraints and future singularities in Unimodular Gravity driven by phantom and non-phantom fluids
Norman Cruz, Samuel Lepe, Guillermo Palma +1
This work investigates future cosmological singularities in a flat FLRW universe filled with a single barotropic fluid, (), within the framework of unimodular gravity.…