Energy constraints for evolving spherical and hyperbolic wormholes in f(R, T) gravity

Zubair, M.; Muneer, Quratulien; Waheed, Saira

doi:10.1140/epjp/s13360-022-02946-7

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…Other modified gravities which are capable of reproducing the dark energy and dark matter have been also studied. [4][5][6][7][8][9] Besides, regarding the electromagnetic nature of some gravitating systems such as galaxies, galaxy clusters, stars, and planets, [10][11][12][13][14][15] we have to connect the Maxwell Lagrangian to gravity model for giving an accurate description of the mentioned systems.…”

Section: Introductionmentioning

confidence: 99%

Noether Gauge Symmetry Approach Applying for the Non‐Minimally Coupled Gravity to the Maxwell Field

Mahmoudi,

Hajkhalili,

Hendi

2023

Fortschritte der Physik

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Taking the Noether gauge symmetry approach into account, spherically symmetric static black hole solutions of the non‐minimal gauge‐gravity Lagrangian of the model is found. At first, a system of differential equations for the general non‐minimal couplings of type is considered, and then, it is regarded as a particular non‐minimal model to find the exact black hole solution and analyze its symmetries. As the next step, the thermodynamical quantities of the black hole and its interesting behavior is calculated. Besides, thermal stability and examining the possibility of the van der Waals‐like phase transition is addressed.

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Section: Introductionmentioning

confidence: 99%

Noether Gauge Symmetry Approach Applying for the Non‐Minimally Coupled Gravity to the Maxwell Field

Mahmoudi,

Hajkhalili,

Hendi

2023

Fortschritte der Physik

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“…Moraes et al [16] presented the ( ˆ) f R T , gravity with R T exp + model and evaluated the Hubble and deceleration parameters. Zubair et al [17] studied the geometry of TWHs in ( ˆ) f R T , gravity with squared-trace component and 'non-exotic' matter. Since GR is basically defined as the Riemann geometric space, a second suitable approach for obtaining extended theories of gravity that may interpret the intensity of gravitational interaction in a good way or may be valid at the large scale of the solar constraints.…”

Section: Introductionmentioning

confidence: 99%

A study of wormhole geometries in symmetric teleparallel gravity

2023

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In this manuscript, we find the exact solutions of asymptotically flat wormhole (WH) geometry in thebackground of symmetric $f(Q)$ gravity (vanishing curvature and torsion) where the non-metricity term$Q$ is accountable for fundamental interaction. In this scenario, we choose two different $f(Q)$gravity models (logarithmic and exponential) along with the special choice of shape function$b(r)=\frac{r}{\exp(\gamma(r-r_{0}))}$, and redshift function $\phi(r)=\frac{r_{0}}{2r}$. Here,$\gamma$ affects the radius of curvature of WH. Under this scenario, we analyze the viability ofthe shape function and energy constraints of the WH solutions for each model. For both models,we determine the validity regions of energy conditions under some parameter spaces of the modelparameters. The allowed parameter spaces for logarithmic and exponential models are illustratedin Tables I and II, respectively. The validity region for the null energy condition represents thatWH geometry in chosen $f(Q)$ gravity models is supported by ordinary matter while exotic matterelsewhere. Furthermore, we represent the WH construction by embedding diagrams andshows that the derived WH solutions are stable for the allowed range of model parameters. Finally,it is concluded that such particular modified gravity can give us a more realistic and stableWH geometry.

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“…In order to overcome the above impasse, some authors have developed many interesting wormhole models in another scenarios, such as higher dimensional theories like Einstein–Gauss–Bonnet, [ 34 ] warped extra dimensions, [ 35 ] GR extensions such as

f(R,T)

gravity, [ 36 ] scale–dependent, [ 37 ] asymptotically safety gravity, [ 38 ] conformal Weyl gravity, [ 39,40 ] teleparalell gravity, [ 41 ] kinetic gravity, [ 42 ] hybrid Palatini–metric gravity, [ 43 ] action dependent Lagrangian theories [ 44 ] and by incorporating 3–form fields [ 45 ] and pole dark energy, [ 46 ] to name a few. In all the mentioned works, the non violation of energy conditions and the satisfaction of the flare–out condition are achieved and justified by extra dimensions and new terms modifying the usual Einstein theory of gravity, GR.…”

Section: Introductionmentioning

confidence: 99%

Minimally Deformed Wormholes Inspired by Noncommutative Geometry

Tello‐Ortiz

Mishra

Alvarez

et al. 2022

Fortschritte der Physik

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In this article, new wormhole solutions in the framework of General Relativity are presented. Taking advantage of gravitational decoupling by means of minimal geometric deformation approach and, the so–called noncommutative geometry Gaussian and Lorentzian density profiles, the seminal Morris–Thorne space–time is minimally deformed providing new asymptotically wormhole solutions. Constraining the signature of some parameters, the dimensionless constant α is bounded using the flare–out and energy conditions. In both cases, this results in an energy–momentum tensor that violates energy conditions, thus the space–time is threading by an exotic matter distribution. However, it is possible to obtain a positive defined density at the wormhole throat and its neighborhood. To further support the study a thoroughly graphical analysis has been performed.

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Energy constraints for evolving spherical and hyperbolic wormholes in f(R, T) gravity

Cited by 7 publications

References 52 publications

Noether Gauge Symmetry Approach Applying for the Non‐Minimally Coupled Gravity to the Maxwell Field

Noether Gauge Symmetry Approach Applying for the Non‐Minimally Coupled Gravity to the Maxwell Field

A study of wormhole geometries in symmetric teleparallel gravity

Minimally Deformed Wormholes Inspired by Noncommutative Geometry

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