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相关论文: Complexity for Dynamical Anisotropic Sphere in f(G…

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The stable critical points and their corresponding cosmology are derived in the teleparallel gravity with an added Gauss-Bonnet topological invariant term. We have analyzed the dynamics of the Universe by presenting two cosmological viable…

广义相对论与量子宇宙学 · 物理学 2023-12-12 S. A. Kadam , Santosh V Lohakare , B. Mishra

The $f(R,T)$ gravity models, for which $R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor, elevate the degrees of freedom of the renowned $f(R)$ theories, by making the Einstein field equations of the theory to also…

广义相对论与量子宇宙学 · 物理学 2024-02-28 J. A. S. Fortunato , P. H. R. S. Moraes , J. G. de Lima Júnior , E. Brito

This paper explores the non-equilibrium behavior of thermodynamics at the apparent horizon of isotropic and homogeneous universe model in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet invariant and trace of…

广义相对论与量子宇宙学 · 物理学 2018-03-13 M. Sharif , Ayesha Ikram

In this paper, we consider the flat Friedmann Lematre Robertson-Walke metric in the presence of perfect fluid models and extended $f(R,G,T)$ gravity (where $R$ is the Ricci scalar, $G$ is the Gauss Bonnet invariant and $T$ stands for trace…

广义相对论与量子宇宙学 · 物理学 2022-12-21 M. Ilyas , Aftab Ahmad , Fawad Khan , M. Wasif

In this work, the $f(\mathcal{G},T)$ theory of gravity is recast in terms of the $\phi$ and $\psi$ fields within the scalar-tensor formulation, where $\mathcal{G}$ is the Gauss-Bonnet term and $T$ denotes the trace of the energy-momentum…

广义相对论与量子宇宙学 · 物理学 2023-12-20 Adam Z. Kaczmarek , Dominik Szczęśniak

This study systematically investigates the cosmological dynamics of two well-motivated functional forms in $f(T,B)$ gravity within a flat Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) universe. Here $T$ denotes the torsion scalar and $B$…

广义相对论与量子宇宙学 · 物理学 2026-02-16 Jianwen Liu , Fabao Gao , Aqeela Razzaq

In this work, we investigate some extensions of the Kiselev black hole solutions in the context of $f(\mathbb{T},\CMcal{T})$ gravity. By mapping the components of the Kiselev energy-momentum tensor into the anisotropic energy-momentum…

广义相对论与量子宇宙学 · 物理学 2025-07-23 Franciele M. da Silva , Luis C. N. Santos , V. B. Bezerra

In this paper, we have explored the field equations of f(T, B) gravity as an extension of teleparallel gravity in an isotropic and homogeneous space time. In the basic formalism developed, the dynamical parameters are derived by…

广义相对论与量子宇宙学 · 物理学 2024-09-27 S. A. Kadam , Jackson Levi Said , B. Mishra

We consider a dynamic scenario for characterizing the late Universe evolution, aiming to mitigate the Hubble tension. Specifically, we consider a metric $f(R)$ gravity in the Jordan frame which is implemented to the dynamics of a flat…

广义相对论与量子宇宙学 · 物理学 2024-08-06 Giovanni Montani , Nakia Carlevaro , Mariaveronica De Angelis

We examine the entropy of self-gravitating anisotropic matter confined to a box in the context of generalrelativity. The configuration of self-gravitating matter is spherically symmetric, but has anisotropic pressure of which angular part…

高能物理 - 理论 · 物理学 2019-09-04 Hyeong-Chan Kim , Youngone Lee

We discuss the interior solutions of fluid Sphere in f(R,T) gravity admitting conformal killing vectors, where R is Ricci scalar and T is trace of energy momentum tensor. The solutions corresponding to isotropic and anisotropic…

广义相对论与量子宇宙学 · 物理学 2018-11-15 M. Zubair , I. H. Sardar , F. Rahaman , G. Abbas

This work aims to identify some inhomogeneity factors for plane symmetric topology with anisotropic and dissipative fluid under the effects of both electromagnetic field as well as Palatini $f(R)$ gravity. We construct the modified field…

广义相对论与量子宇宙学 · 物理学 2016-05-12 M. Zaeem Ul Haq Bhatti , Z. Yousaf

We investigate the dynamics of Einstein equations in the vicinity of the two recently described types of singularity of anisotropic and homogeneous cosmological models described by the action $$ S=\int d^4x \sqrt{-g}{F(\phi)R -…

广义相对论与量子宇宙学 · 物理学 2007-05-23 L. R. Abramo , L. Brenig , E. Gunzig , Alberto Saa

Within the limits of the present cosmological observations in f(R,T) gravity theory, we have analyzed a spherically symmetric space-time in 5D setting. The field equations have been carefully studied considering reasonable cosmological…

广义相对论与量子宇宙学 · 物理学 2020-10-28 Pheiroijam Suranjoy Singh , Kangujam Priyokumar Singh

This manuscript copes with the issue of analyzing the conditions to check the stability of the pressure isotropy condition by taking into account a spherically symmetric dissipative astrophysical configuration with the Palatini $f(R)$…

广义相对论与量子宇宙学 · 物理学 2021-08-31 Z. Tariq , M. Z. Bhatti , Z. Yousaf

In this article, we explore some emerging properties of the stellar objects in the frame of the $f(R,T)$ gravity by employing the well-known Karmarkar condition, where $R$ and $T$ represent Ricci scalar and trace of energy momentum tensor…

广义相对论与量子宇宙学 · 物理学 2023-05-24 Zoya Asghar , M. Farasat Shamir , Ammara Usman , Adnan Malik

The recently proposed $f(Q, T)$ gravity (Xu et al. Eur. Phys. J. C \textbf{79} (2019) 708) is an extension of the symmetric teleparallel gravity. The gravitational action $L$ is given by an arbitrary function $f$ of the non-metricity $Q$…

广义相对论与量子宇宙学 · 物理学 2020-10-02 Simran Arora , P. K. Sahoo

In this paper we undertake the modified theory of gravity f(R,T) where R and T are the Ricci scalar and the trace of the energy momentum tensor, respectively. Imposing the conservation of the energy momentum tensor, we obtain a model about…

广义相对论与量子宇宙学 · 物理学 2015-06-30 E. H. Baffou , A. V. Kpadonou , M. E. Rodrigues , M. J. S. Houndjo , J. Tossa

This paper investigates the energy bounds in modified Gauss-Bonnet gravity with anisotropic background. Locally rotationally symmetric Bianchi type ${I}$ cosmological model in $f(R,G)$ gravity is considered to meet this aim. Primarily, a…

综合物理 · 物理学 2017-12-07 M. Farasat Shamir , Ayesha Komal

The energy conditions are derived in the context of $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor, which can reduce to the well-known conditions in $f(R)$ gravity and general relativity.…

广义相对论与量子宇宙学 · 物理学 2015-06-11 Muhammad Sharif , Muhammad Zubair