2 citations · 2 across the 1 of their papers we have counts for
4 papers
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…
Structure formation in an anisotropic universe: Eulerian perturbation theory
Juan P. Beltrán Almeida, Josué Motoa-Manzano, Jorge Noreña +2
We present an effective Eulerian description, in the non-relativistic regime, of the growth of cosmological perturbations around a homogeneous but anisotropic Bianchi I spacetime b…
Anisotropic Scalar Field Dark Energy with a Disformally Coupled Yang-Mills Field
L. Gabriel Gomez, Yeinzon Rodriguez, Juan P. Beltran Almeida
In the context of scalar-tensor theories, the inclusion of new degrees of freedom coupled non-minimally to the gravitational sector might produce some appealing effects on the cosm…
-form quintessence: exploring dark energy of forms coupled to a scalar field
Alejandro Guarnizo, Juan P. Beltrán Almeida, César A. Valenzuela-Toledo
We consider a model based on form kinetic Lagrangians in the context of dark energy. The Lagrangian of the model is built with kinetic terms of the field strength for each -…