Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Díaz Barrón, A."'
We conduct a (pre-)inflationary dynamics study within the framework of a simple noncommutative extension of effective loop quantum cosmology -- put forward recently by the authors -- which preserves its key features (in particular, the quantum bounce
Externí odkaz:
http://arxiv.org/abs/2308.01363
Autor:
Socorro, J., Pérez-Payán, S., Hernández-Jiménez, Rafael, Espinoza-García, Abraham, Díaz-Barrón, Luis Rey
In this paper we present an analysis of a chiral anisotropic cosmological scenario from the perspective of quintom fields. In this setup quintessence and phantom fields interact in a non-standard (chiral) way within an anisotropic Bianchi type I back
Externí odkaz:
http://arxiv.org/abs/2210.01186
Autor:
Socorro, J., Pérez-Payán, S., Hernández-Jiménez, Rafael, Espinoza-García, Abraham, Díaz-Barrón, Luis Rey
Publikováno v:
Universe 2022, 8, 00548
In this paper, we present an analysis of a chiral cosmological scenario from the perspective of K-essence formalism. In this setup, several scalar fields interact within the kinetic and potential sectors. However, we only consider a flat Friedmann--R
Externí odkaz:
http://arxiv.org/abs/2204.12083
Publikováno v:
Phys. Rev. D 104, 023508 (2021)
We construct and study a simple noncommutative scheme (theta-deformation) for the effective Loop Quantum Cosmology of the flat Friedmann-Lema\^itre-Robertson-Walker model in the presence of a homogeneous scalar field $\phi$ with a potential $\mathcal
Externí odkaz:
http://arxiv.org/abs/2104.02859
In this work, we investigate the anisotropic Bianchi type I cosmological model in the chiral setup, in a twofold manner. Firstly, we consider a quintessence plus a k-essence like model, where two scalar fields but only one potential term is considere
Externí odkaz:
http://arxiv.org/abs/2101.05973
Autor:
Socorro, J., Pérez-Payán, S., Hernández, Rafael, Espinoza-García, Abraham, Díaz-Barrón, Luis Rey
In this work, first, we study a flat Friedmann-Robertson-Walker Universe with two scalar fields but only one potential term, which can be thought as a simple quintessence plus a K-essence model. Employing the Hamiltonian formalism we are able to obta
Externí odkaz:
http://arxiv.org/abs/2012.11108
Publikováno v:
Physics Letters B, Vol 847, Iss , Pp 138299- (2023)
We conduct a (pre-)inflationary dynamics study of the chaotic quadratic potential within the framework of a simple noncommutative extension of effective loop quantum cosmology put forward recently. It is concluded that, for typically small values of
Externí odkaz:
https://doaj.org/article/bad0c0b765224b1c8c3d7f3bdc717dfd
Autor:
Diaz-Barron, Luis R., Sabido, M.
In this paper we study the "ungravity" modifications to the Friedmann equations. By using the first law of thermodynamics and the modified entropy area relationship derived from the "ungravity" contributions to the Schwarzschild black hole, we obtain
Externí odkaz:
http://arxiv.org/abs/1912.09000
Under the premise that the current observations of the cosmic microwave background radiation set a very stringent limit to the anisotropy of the universe, we consider an anistropic model in the presence of a barotropic perfect fluid and a homogeneous
Externí odkaz:
http://arxiv.org/abs/1911.09094
In this work we construct a noncommutative version of the Friedmann equations in the framework of effective loop quantum cosmology, extending and applying the ideas presented in a previous proposal by some of the authors. The model under consideratio
Externí odkaz:
http://arxiv.org/abs/1904.01212