3 papers
gr-qc2026
Post-Newtonian Constraints on Scalar-Tensor Gravity
Alexandros Karam, Samuel Sánchez López, José Jaime Terente Díaz
Solar-System constraints on a general scalar-tensor theory with generic non-minimal coupling function, non-canonical kinetic function, and scalar potential, are investigated in bot…
astro-ph.CO2025
Non-Minimally Coupled Quintessence in Light of DESI
Samuel Sánchez López, Alexandros Karam, Dhiraj Kumar Hazra
We analyze a model of quintessence governed by an exponential potential and non-minimally coupled to gravity, in light of recent datasets, including cosmic microwave background, ba…
gr-qc2023
Explaining the Hubble tension and dark energy from alpha-attractors
Lucy Brissenden, Konstantinos Dimopoulos, Samuel Sánchez López
A compelling unified model of dark energy and early dark energy (EDE) is presented, using a scalar field with an exponential runaway potential, in the context of alpha-attractors.…