Influence of EMSG on complex systems: Spherically symmetric, static case

Nasir, M. M. M.; Bhatti, M. Z.; Yousaf, Z.

doi:10.1142/s0218271823500098

Cited by 9 publications

(4 citation statements)

References 60 publications

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“…where, G = 24H 2 ( Ḣ + H 2 ). Yousaf and his collaborators checked the stability of cosmic models in various modified gravity theories [45][46][47][48].…”

Section: F (G T αβ T αβ ) Formalismmentioning

confidence: 99%

Non-Singular Bouncing Model in Energy Momentum Squared Gravity

Yousaf,

Bhatti,

Aman

et al. 2023

Preprint

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This work is concerned to study the bouncing nature of the universe for an isotropic configuration of fluid T αβ and Friedmann-Lemaître-Robertson-Walker metric scheme. This work is carried out under the novel f (G, T αβ T αβ ) gravitation by assuming a specific model i.e, f (G, T 2 ) = G + αG 2 + 2λT 2 with α and λ are constants, serving as free parameters. The terms G and T 2 served as an Gauss-Bonnet invariant and square of the energy-momentum trace term as an inclusion in the gravitational action respectively, and is proportional to T 2 = T αβ T αβ . A specific functional form of the Hubble parameter is taken to provide the evolution of cosmographic parameters. A well known equation of state parameter, ω(t) = − k log(t+ǫ) t − 1 is used to represent the dynamical behavior of energy density, matter pressure and energy conditions. A detailed graphical analysis is also provided to review the bounce. Furthermore, all free parameters are set in a way, to make the supposed Hubble parameter act as the bouncing solution and ensure the viability of energy conditions. Conclusively, all necessary conditions for a bouncing model are checked.

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“…where, G = 24H 2 ( Ḣ + H 2 ). Yousaf and his collaborators checked the stability of cosmic models in various modified gravity theories [45][46][47][48].…”

Section: F (G T αβ T αβ ) Formalismmentioning

confidence: 99%

Non-Singular Bouncing Model in Energy Momentum Squared Gravity

Yousaf,

Bhatti,

Aman

et al. 2023

Preprint

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“…They also investigated the stability and equilibrium conditions of the solution and showed that the predicted radii were consistent with the M − R curve observed during the GW170817 event. Yousaf et al [25][26][27] conducted a recent study to explore the impact of a newly modified version of GB gravity on the intricacy of compact fluid configuration with and without influence of electric charge intensity. Khlopov et al [28] studied a dust-like non-relativistic matter instability that includes field self-interaction and is related to Jean's instability.…”

Section: Introductionmentioning

confidence: 99%

“…Yousaf et al. [ 25–27 ] conducted a recent study to explore the impact of a newly modified version of GB gravity on the intricacy of compact fluid configuration with and without influence of electric charge intensity. Khlopov et al.…”

Section: Introductionmentioning

confidence: 99%

Dynamically Charged Spheres and their Stability in Einstein‐Gauss‐Bonnet Gravity

ur Rehman,

ul Haq Bhatti,

Yousaf

2024

Fortschritte der Physik

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Electrically charged anisotropic fluid spheres with vanishing expansion scalar condition under the influence of a newly established gravitational scheme are investigated in this study, i.e., Einstein‐Gauss‐Bonnet (EGB) gravity. Glavan and Lin introduced this framework, in which they rescaled the coupling factor α using and derived the gravitational field equations. The work of Herrera et al. is extended to explore the dynamical instability of charged spherically symmetric matter distribution in the context of EGB gravity. In this respect, dynamical equations, conservation equations, and junction conditions for charged sphere are computed. To study the evolution of considered system in the Newtonian and post‐Newtonian regimes against an expansion‐free background, several substantial restrictions are imposed employing a perturbation approach. This study showed that the adiabatic index (Γ) has no effect on the instability ranges in the aforementioned approximations. It is analyzed that the determination of these ranges solely attributed to the anisotropy of fluid surface pressures, radial profile, EGB factors, and charged intensity parameters along with the radial distribution of energy density.

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“…Additionally, modified gravity theories have been used to examine wormhole geometries. The study of thermodynamics, the enigmatic growth of the Universe, gravitational wave phenomena, cosmological packed structures, and dynamical in/stability restrictions with and without electromagnetic interactions have all been done using this expanded form of gravitational theory [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Thin-shell wormholes and modified Chaplygin gas with relativistic corrections

Bhatti,

Yousaf,

Yousaf

2023

Commun. Theor. Phys.

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In this manuscript, we analyze thin-shell wormholes from two identical copies of charged static cylindrically symmetric spacetimes using Visser's ``cut and paste'' approach under the influence of $f(R, T)$ gravity \cite{harko2011f}. In this scenario, the modified Chaplygin gas supports the exotic matter in the shell which allows, one to examine the dynamics of constructed wormholes. We utilize the junction condition to connect the interior and exterior geometries across the hypersurface and calculate different components of the Lanczos equation recently computed by Roza in \cite{rosa2021junction}. We analyze the stability of the thin-shell wormhole models under linear perturbations while keeping the cylindrical symmetry and also examine the influence of charge on their stability. The positive quantity of the second derivative of potential at the throat radius might be interpreted as the stability criterion. We find both unstable and stable wormhole solutions for different parameters included in the equation of state and specific forms of considered gravity and illustrate them theoretically as well as graphically. We examine the impact of electric charge on the stability region of a constructed wormhole, which suggest that a wormhole model with a charge may exhibit more stable behavior as compared to uncharged system.

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Influence of EMSG on complex systems: Spherically symmetric, static case

Cited by 9 publications

References 60 publications

Non-Singular Bouncing Model in Energy Momentum Squared Gravity

Non-Singular Bouncing Model in Energy Momentum Squared Gravity

Dynamically Charged Spheres and their Stability in Einstein‐Gauss‐Bonnet Gravity

Thin-shell wormholes and modified Chaplygin gas with relativistic corrections

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