Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Nagpal, Ritika"'
Autor:
Singh, J. K., Nagpal, Ritika
Publikováno v:
Indian Journal of Physics 2023
In this study, we will look at an interacting dark energy model. In the framework of Friedmann-Robertson-Walker (FRW) space-time, we have made the hypothesis of an interacting scheme between two fields (dark matter (DM) and dark energy (DE)). The evo
Externí odkaz:
http://arxiv.org/abs/2311.13607
The current paper provides a comprehensive examination of a dark energy cosmological model in the classical regime, in which a generic scalar field is regarded as a dark energy source. Einstein's field equations are solved in model independent way i.
Externí odkaz:
http://arxiv.org/abs/2203.13992
Publikováno v:
European Physical Journal Plus 136, 875 (2021)
In this paper, we have considered a quadratic variation of the deceleration parameter ($q$) as a function of cosmic time ($t$) which describes a smooth transition from the decelerating phase of the Universe to an accelerating one and also show some d
Externí odkaz:
http://arxiv.org/abs/2108.06077
Autor:
Singh, J. K., Nagpal, Ritika
Publikováno v:
The European Physical Journal C , 80, Article number: 295 (2020)
In this paper, we study a cosmological model in the background of FLRW space time by assuming an appropriate parametrization in the form of a differential equation in terms of energy density of scalar field $ \rho_{\phi} $, which is defined as Energy
Externí odkaz:
http://arxiv.org/abs/1910.09289
This article deals with a cosmological scenario in $ f(R,T) $ gravity for a flat FLRW model of the universe. We consider the $ f(R,T) $ function as $ f(R)+f(T) $ which starts with a quadratic correction of the geometric term $ f(R) $ having structure
Externí odkaz:
http://arxiv.org/abs/1903.08562
Publikováno v:
Phys.Rev. D97 (2018) no.12, 123536
A cosmological model with a specific form of the Hubble parameter is constructed in a flat homogeneous, and isotropic background in the framework of $f(R, T)$ gravity, where $R$ is the scalar curvature and $T$ is the trace of the stress-energy-moment
Externí odkaz:
http://arxiv.org/abs/1807.01157
Publikováno v:
Astrophys.Space Sci. 363 (2018) no.6, 114
In this paper, we have studied the magnetized quark matter (QM) and strange quark matter (SQM) distributions in the presence of $ f(R,T)$ gravity in the background of Friedmann--Lema\^itre--Robertson--Walker (FLRW) metric. To get exact solutions of m
Externí odkaz:
http://arxiv.org/abs/1805.06766
Publikováno v:
Eur. Phys. J. C 78 (2018) 946
An exact cosmological solution of Einstein field equations (EFEs) is derived for a dynamical vacuum energy in $f(R,T)$ gravity for Friedmann-Lemaitre-Robertson-Walker (FLRW) space-time. A parametrization of the Hubble parameter is used to find a dete
Externí odkaz:
http://arxiv.org/abs/1805.03015
Statefinder diagnostic for modified Chaplygin gas cosmology in f(R,T) gravity with particle creation
Publikováno v:
International Journal of Geometric Methods in Modern Physics, Vol. 15, No. 3 (2018) 1850049 (22 pages)
In this paper, we have studied flat Friedmann--Lema\^{\i}tre--Robertson--Walker (FLRW) model with modified Chaplygin gas (MCG) having equation of state $p_{m}=A\rho -% \frac{B}{\rho ^{\gamma }}$, where $0\leq A\leq 1$, $0\leq \gamma \leq 1$ and $B$ i
Externí odkaz:
http://arxiv.org/abs/1710.09257
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