Zobrazeno 1 - 10
of 438
pro vyhledávání: '"Singh, J. K."'
In this study, we present an approach $ f(R, G) $ gravity incorporating power law in $ G $. To study the cosmic evolution of the universe given by the reconstruction of the Hubble parameter given by $ E(z) = \bigg( 1+\frac{z(\alpha+(1+z)^{\beta})}{2
Externí odkaz:
http://arxiv.org/abs/2409.18160
In this investigation, we perform an observational statistical analysis in the theory of $ f(R, L_m) $ gravity. The proposed theoretical model is based on the Ricci scalar's non-linear contribution. We use a distinct parameterization for the decelera
Externí odkaz:
http://arxiv.org/abs/2408.16038
We obtain an exact solution of spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter (PFDM). Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable, we analyse
Externí odkaz:
http://arxiv.org/abs/2403.16454
We study a cosmological model in Rastall's theory of gravity in the framework of the flat FLRW metric. We formulate the value of the Hubble parameter, which contains two model parameters, $ \alpha $ and $ j $. Employing the Markov Chain Monte Carlo (
Externí odkaz:
http://arxiv.org/abs/2402.08709
We propose a novel cosmological framework within the $f(R,T)$ type modified gravity theory, incorporating a non-minimally coupled with the higher order of the Ricci scalar ($R$) as well as the trace of the energy-momentum tensor ($T$). Therefore, our
Externí odkaz:
http://arxiv.org/abs/2402.01780
We perform observational confrontation and cosmographic analysis of $f(T,T_G)$ gravity and cosmology. This higher-order torsional gravity is based on both the torsion scalar, as well as on the teleparallel equivalent of the Gauss-Bonnet combination,
Externí odkaz:
http://arxiv.org/abs/2312.17277
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
Publikováno v:
Physics of the Dark Universe, 2024
This paper investigates the flat Friedmann-Lema$\hat{\imath}$tre-Robertson-Walker (FLRW) cosmological model using a suitable parameterization represented as a differential equation concerning the energy density of the scalar field, $\rho_{\phi}$, in
Externí odkaz:
http://arxiv.org/abs/2311.11926
We propose to develop a cosmological model of the universe based on Weyl type $ f(Q) $ gravity which shows the transition from decelerating in the past to acceleration at present by considering a particular functional form of $ f(Q) $ gravity as $ f(
Externí odkaz:
http://arxiv.org/abs/2309.01233
We investigate a bounce realization in the framework of higher order curvature in $ f(R,T) $ modified theory of gravity. We perform a detailed analysis of the cosmological parameters to explain the contraction phase, the bounce phase, and the expansi
Externí odkaz:
http://arxiv.org/abs/2304.11578