Zobrazeno 1 - 10
of 67
pro vyhledávání: '"A Tajahmad"'
Autor:
Tajahmad, Behzad
This paper studies inflation and isotropization in the quintom model in the Bianchi I, Bianchi III, and Kantowski-Sachs backgrounds. First, we investigate inherent properties and generalize Heusler's proposition. Then by the use of the dynamical syst
Externí odkaz:
http://arxiv.org/abs/2402.05454
Autor:
Tajahmad, Behzad
It is well known that in quantum gravity, the very geometry of space and time is subject to continual fluctuation. The mathematical formulation for this old theory is still lacking. This article formulates this more than forty-year-old theory of quan
Externí odkaz:
http://arxiv.org/abs/2212.12466
Autor:
Tajahmad, Behzad, Motavalli, Hossein
Recently, a Friedmann-Robertson-Walker universe filled with various cosmological fluids has been considered by S.D. Odintsov et al. in [30] from phase space vantage point where various expressions for the Equation-of-State (EoS) parameter were studie
Externí odkaz:
http://arxiv.org/abs/2101.05199
Autor:
Tajahmad, Behzad
Recently, a new strategy to the reconstruction of $f(R)$-gravity models based on the Raychaudhuri equation has been suggested by Choudhury et al. In this paper, utilizing this method, the reconstruction of anisotropic Einstein-Maxwell equation in the
Externí odkaz:
http://arxiv.org/abs/2001.03613
Autor:
Tajahmad, Behzad
In this paper, a modified teleparallel gravity action containing a coupling between a scalar field potential and magnetism, in anisotropic and homogeneous backgrounds, is investigated through Noether symmetry approach. The focus of this work is to de
Externí odkaz:
http://arxiv.org/abs/1905.07724
Autor:
Tajahmad, Behzad
A technique for the reconstruction of the potential for a scalar field in cosmological models based on induced gravity has recently been developed by Alexander Y. Kamenshchik, Alessandro Tronconi, and Giovanni Venturi \cite{ref1}. In this paper, this
Externí odkaz:
http://arxiv.org/abs/1812.10339
Autor:
Tajahmad, Behzad
A new approach, "$\mathfrak{B}\text{-Function}$ Method", to the analysis of the reconstruction methods, phase space, and exact solutions of the alternative theories of gravity is suggested. The $\mathfrak{B}\text{-function}$ method which is construct
Externí odkaz:
http://arxiv.org/abs/1812.03317
Autor:
Behzad Tajahmad
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 10, Pp 1-8 (2022)
Abstract The effects of minisuperspace deformation on Einstein–Hilbert action along with ordinary and phantom scalar fields as the matter contents are investigated. It is demonstrated that late-time-accelerated expansion and phase transition (from
Externí odkaz:
https://doaj.org/article/94d4349f15f34b0e882980adf4da565d
Autor:
Tajahmad, Behzad
Publikováno v:
International Journal of Geometric Methods in Modern Physics; Nov2024, Vol. 21 Issue 13, p1-16, 16p