3 papers
gr-qc2026
Cosmological Stealth fields and Non-Equilibrium thermodynamics
Gilberto Aguilar-Pérez, Cuauhtemoc Campuzano, VÃctor 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) backgrou…
astro-ph.CO2025
Revealing evolution of Dark Energy density from observations
José Blanco, VÃctor H. Cárdenas, Cuauhtémoc Campuzano
We present a model--independent reconstruction of the normalized dark energy density function, , derived directly from the DES-…
gr-qc2025
Non-geometrical perturbation on homogeneous stealth dust
José Blanco, Cuauhtemoc Campuzano, J. C. Corona-Oran +1
In this work, we study a non-geometrical perturbation to the stealth field, which means the background remains invariant. The stealh is homogeneous in a universe whose source is du…