89 citations · 609 across the 35 of their papers we have counts for
35 papers
MG-NECOLA: A Field-Level Emulator for Gravity and Massive Neutrino Cosmologies
J. Bayron Orjuela-Quintana, Mauricio Reyes, Elena Giusarma +3
Accurate modeling of non-linear gravitational dynamics is essential for constraining extensions to the standard cosmological model using large-scale structure observations. While h…
MG-NECOLA: Fast Neural Emulators for Modified Gravity Cosmologies
J. Bayron Orjuela-Quintana, Mauricio Reyes, Elena Giusarma +3
Observations of the large-scale structure (LSS) provide a powerful test of gravity on cosmological scales, but high-resolution N-body simulations of modified gravity (MG) are prohi…
Inconsistencies of Tsallis Cosmology within Horizon Thermodynamics and Holographic Scenarios
Pedro M. Ibarbo-Perlaza., J. Bayron Orjuela-Quintana, Jose L. Palacios-Córdoba +1
We investigate the cosmological implications of Tsallis entropy in two widely discussed frameworks: the Cai-Kim thermodynamic derivation of the Friedman equations and the Tsallis h…
Anisotropic Universes in Light of Background Cosmological Observations
Jose L. Palacios-Córdoba, J. Bayron Orjuela-Quintana, Gabriela A. Valencia-Zuñiga +1
The cosmological principle is a cornerstone of the standard cosmological model. However, recent observations suggest potential deviations from this assumption, hinting at a small a…
Anisotropic Dark Energy from String Compactifications
Diego Gallego, J. Bayron Orjuela-Quintana, César A. Valenzuela-Toledo
We explore the cosmological dynamics of a minimalistic yet generic string-inspired model for multifield dark energy. Adopting a supergravity four-dimensional viewpoint, we motivate…
Multifield curved solid: Early dark energy and perturbation instabilities
Juan P. Beltrán Almeida, Alejandro Guarnizo, Thiago S. Pereira +1
We introduce a multifield dark energy model with a nonflat field-space metric, in which one field is dynamical while the others have constant spatial gradients. The model is predic…