Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Luis Rey Díaz Barrón"'
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
Publikováno v:
Universe, Vol 10, Iss 2, p 88 (2024)
We construct and examine a holonomy-corrected chiral fields model of cosmological relevance. Specifically, we holonomize the Hamiltonian corresponding to a quintom field scenario with additional kinetic interaction (governed by the constant chiral me
Externí odkaz:
https://doaj.org/article/d3e948e98b754c479ae161a710be0502
Autor:
José Socorro, Sinuhé Pérez-Payán, Rafael Hernández-Jiménez, Abraham Espinoza-García, Luis Rey Díaz-Barrón
Publikováno v:
Universe, Vol 8, Iss 10, p 548 (2022)
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–
Externí odkaz:
https://doaj.org/article/4badf30c82484403bd9248107fa7d70c
Publikováno v:
Advances in High Energy Physics, Vol 2019 (2019)
We construct a noncommutative extension of the Loop Quantum Cosmology effective scheme for the flat FLRW model with a free scalar field via a theta deformation. Firstly, a deformation is implemented in the configuration sector, among the holonomy var
Externí odkaz:
https://doaj.org/article/6587ff6e991646c69cec59ed435abe0f
Autor:
M. Sabido, Luis Rey Díaz-Barrón
Publikováno v:
Physics Letters
Physics Letters B, Vol 818, Iss, Pp 136365-(2021)
Physics Letters B, Vol 818, Iss, Pp 136365-(2021)
In this work we study the “ungravity” modifications to the Friedmann equations. The “ungravity” contributions are encoded in a modified entropy-area relation. To derive the modified Friedmann equations we use the first law of thermodynamics a
Publikováno v:
Physical Review D. 104
We construct and study a simple noncommutative scheme (theta-deformation) for the effective loop quantum cosmology of the flat Friedmann-Lema\^{\i}tre-Robertson-Walker model in the presence of a homogeneous scalar field $\ensuremath{\phi}$ with a pot
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::581e8341b6621cc177a6f4170435a4bc
Autor:
Abraham Espinoza-García, Luis Rey Díaz-Barrón, José Socorro, Sinuhé Pérez-Payán, Rafael Hernández-Jiménez
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8011f5b51ac988c4f8378aeeb87d85e
http://arxiv.org/abs/2012.11108
http://arxiv.org/abs/2012.11108
Publikováno v:
Astrophysics and Space Science. 365
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