Cosmote (Greece)

A Novel Phenomenological Ansatz for Dynamical Dark Energy: Resolving Cosmological Tensions via Cosmic-Time Exponentials

We introduce a novel three-parameter phenomenological ansatz for the dark energy equation of state (EoS) parametrized as w(t) = w_inf - exp(K t)/V_0, where t denotes the cosmic time measured relative to the current epoch. We confront this formulation against the latest Baryon Aco...

Torsion constraints driven by TEGR topological defects in null coordinates, GWs and matching conditions

Abstract New constraints on Cartan torsion components are obtained from the teleparallel equivalent of General Relativity (TEGR) repulsive gravity with global textures. The interior solution is considered a global texture fulfilling Einstein gravity, whereas the exterior solution...