Energy Conditions in $f(\mathcal{G},T)$ Gravity
Muhammad Sharif,Ayesha Ikram +1 more
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In this paper, a modified gravity theory named as $f(\mathcal{G,T)$ gravity was introduced and investigated energy conditions for two reconstructed models in the context of FRW universe.Abstract:
The aim of this paper is to introduce a new modified gravity theory named as $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ are the Gauss-Bonnet invariant and trace of the energy-momentum tensor, respectively) and investigate energy conditions for two reconstructed models in the context of FRW universe. We formulate general field equations, divergence of energy-momentum tensor, equation of motion for test particles as well as corresponding energy conditions. The massive test particles follow non-geodesic lines of geometry due to the presence of extra force. We express energy conditions in terms of cosmological parameters like deceleration, jerk and snap parameters. The reconstruction technique is applied to this theory using de Sitter and power-law cosmological solutions. We analyze energy bounds and obtain feasible constraints on free parameters.read more
Citations
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Stability analysis of some reconstructed cosmological models in f(G , T) gravity
Muhammad Sharif,Ayesha Ikram +1 more
TL;DR: In this paper, the authors reconstruct and analyze the stability of cosmological models against linear perturbations in f (G, T ) gravity (G and T represent the Gauss-Bonnet invariant and trace of the energymomentum tensor, respectively) and formulate the field equations for both general as well as particular cases in the context of isotropic and homogeneous universe model.
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Noether Symmetry Approach in $f(\mathcal{G},T)$ Gravity
M. Farasat Shamir,Mushtaq Ahmad +1 more
TL;DR: In this article, the modified Gauss-Bonnet gravity model was explored for flat FRW universe and the deSitter solution was reconstructed for some specific choice of gravity model.
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Behavior of Anisotropic Compact Stars in f(R, ϕ) Gravity
M. Farasat Shamir,Adnan Malik +1 more
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Anisotropic quark stars in f ( R , T ) gravity
Muhammad Sharif,Arfa Waseem +1 more
TL;DR: In this article, anisotropic spherically symmetric relativistic star models in the framework of f(R, T) gravity were analyzed and the authors concluded that their model satisfies the stability criteria as well as other physical requirements.
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Tsallis Holographic Dark Energy in f(G,T) Gravity
Muhammad Sharif,Saadia Saba +1 more
TL;DR: The derived models demonstrate a self-consistent phantom universe behavior based on generalized Tsallis entropy conjecture with Hubble horizon in the framework of f ( G , T ) gravity.
References
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$f(R,T)$ gravity
TL;DR: In this article, the authors considered a modified theory of gravity, where the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar and of the trace of the stress-energy tensor.