Thermodynamics and logarithmic corrections of symmergent black holes

Ali, Riasat; Babar, Rimsha; Akhtar, Zunaira; Овгун, Али

doi:10.1016/j.rinp.2023.106300

Cited by 17 publications

(16 citation statements)

References 61 publications

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“…Symmergent gravity is essentially emergent general relativity (GR) with a quadratic curvature term. It exhibits distinctive signatures, as revealed in recent works on static black hole spacetimes [7][8][9][10]. In the present work, we use observational data on M87* and Srg.A* black holes to study symmergent gravity.…”

Section: Introductionmentioning

confidence: 79%

“…It is with these loop features that the GR emerges. In fact, the metric-Palatini action (3) reduces to the metrical gravity theory (10) after replacing the affine curvature R μν ( ) with its solution in (9). Of the parameters of this emergent GR action, Newton's constant G was already defined in (4).…”

Section: Symmergent Gravitymentioning

confidence: 99%

“…(It reads c S 0.29 in the standard model.) The loop factor c O , which was associated with the quartic ( 4 ) corrections in the flat spacetime effective QFT in (1), turned to the coefficient of quadraticcurvature (R 2 ) term in the symmergent GR action in (10). At one loop, it takes the value…”

Section: Symmergent Gravitymentioning

confidence: 99%

“…(The loop factor c S and similar parameters couple the matter fields.) Once the gravity emerges as in (10), however, G, c O and V O gain a completely new physical meaning as the curvature sector parameters (not involving the matter fields). In this sense, they are symmergent gravity parameters in the sense that they became curvature sector parameters via the symmergence.…”

Section: Symmergent Gravitymentioning

confidence: 99%

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Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results

Pantig

Овгун²,

Demir

2023

Eur. Phys. J. C

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In this paper, we study rotating black holes in symmergent gravity, and use deviations from the Kerr black hole to constrain the parameters of the symmergent gravity. Symmergent gravity induces the gravitational constant G and quadratic curvature coefficient $$c_{\textrm{O}}$$ c O from the flat spacetime matter loops. In the limit in which all fields are degenerate in mass, the vacuum energy $$V_{\textrm{O}}$$ V O can be wholly expressed in terms of G and $$c_{\textrm{O}}$$ c O . We parametrize deviation from this degenerate limit by a parameter $${\hat{\alpha }}$$ α ^ such that the black hole spacetime is dS for $${\hat{\alpha }} < 1$$ α ^ < 1 and AdS for $${\hat{\alpha }} > 1$$ α ^ > 1 . In constraining the symmergent parameters $$c_{\textrm{O}}$$ c O and $${\hat{\alpha }}$$ α ^ , we utilize the EHT observations on the M87* and Sgr. A* black holes. We investigate first the modifications in the photon sphere and shadow size, and find significant deviations in the photonsphere radius and the shadow radius with respect to the Kerr solution. We also find that the geodesics of time-like particles are more sensitive to symmergent gravity effects than the null geodesics. Finally, we analyze the weak field limit of the deflection angle, where we use the Gauss-Bonnet theorem for taking into account the finite distance of the source and the receiver to the lensing object. Remarkably, the distance of the receiver (or source) from the lensing object greatly influences the deflection angle. Moreover, $$c_{\textrm{O}}$$ c O needs be negative for a consistent solution. In our analysis, the rotating black hole acts as a particle accelerator and possesses the sensitivity to probe the symmergent gravity.

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Section: Introductionmentioning

confidence: 79%

Section: Symmergent Gravitymentioning

confidence: 99%

Section: Symmergent Gravitymentioning

confidence: 99%

Section: Symmergent Gravitymentioning

confidence: 99%

See 2 more Smart Citations

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results

Pantig

Овгун²,

Demir

2023

Eur. Phys. J. C

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“…In addition, symmergent gravity itself may realize a quantum cosmology phase [91]. One other effect concerns the black holes, which put limits [92][93][94][95] on c O and the vacuum energy V (µ) through the EHT observations [96]. Effects of c O on stellar structure and wormhole dynamics can also be significant.…”

Section: Salient Implications Of the Symmergent Gravitymentioning

confidence: 99%

Gauge and Poincaré properties of the UV cutoff and UV completion in quantum field theory

Demir

2023

Phys. Rev. D

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The ultraviolet (UV) cutoff on a quantum field theory (QFT) can explicitly break or conserve the Poincare (translation) symmetry. And the very same cutoff can explicitly break or conserve the gauge symmetry. In the present work, we perform a systematic study of the UV cutoff in regard to its gauge and Poincare properties, and construct UV completions restoring the broken gauge symmetry. In the case of Poincare-conserving UV cutoff, we find that the gauge symmetry gets restored via the Higgs mechanism. In the case of Poincare-breaking UV cutoff, however, we find that the flat spacetime affine curvature takes the place of the Higgs field and, when taken to curved spacetime, gauge symmetry gets restored at the extremum of the metric-affine action. We also find that gravity emerges at the extremum if the QFT under concern consists of new particles beyond the known ones. The resulting emergent gravity plus renormalized QFT setup has the potential to reveal itself in various astrophysical, cosmological and collider phenomena.

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Study of the Deflection Angle and Shadow of Black Hole Solutions in Non‐Plasma and Plasma Mediums Under the Effect of Einstein–Gauss–Bonnet Gravity

2023

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In this paper, the Gibbons and Werner technique is used to calculate the weak deflection angle for the black hole solution under the effects of Einstein–Gauss–Bonnet gravity. The Gauss–Bonnet theorem in the limits of weak field is used to evaluate the Gaussian optical curvature in order to obtain the results. The visual effects of the deflection angle on the impact parameter is also looked at and the smallest radius in the non‐plasma/plasma medium. Moreover, in order to check the consistency of the results concerning the weak deflection angle, the Keeton and Petters approach is applied to study the deflection angle, which is the expansion of series with a single mass variable, which can be directly addressed by using the post–post Newtonian framework. Furthermore, the deflection angle and shadow under the influence of the plasma is examined by using the motion of particle in a non‐magnetized plasma and pressure‐free plasma medium as described by the new ray‐tracing algorithm. It is shown that plasma as well as Einstein–Gauss‐Bonnet gravity corrections are affected by shadows.

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Thermodynamics and logarithmic corrections of symmergent black holes

Cited by 17 publications

References 61 publications

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results

Gauge and Poincaré properties of the UV cutoff and UV completion in quantum field theory

Study of the Deflection Angle and Shadow of Black Hole Solutions in Non‐Plasma and Plasma Mediums Under the Effect of Einstein–Gauss–Bonnet Gravity

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Thermodynamics and logarithmic corrections of symmergent black holes

Cited by 17 publications

References 61 publications

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^*$$ and Sgr. $$\hbox {A}^*$$ results

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^*$$ and Sgr. $$\hbox {A}^*$$ results

Gauge and Poincaré properties of the UV cutoff and UV completion in quantum field theory

Study of the Deflection Angle and Shadow of Black Hole Solutions in Non‐Plasma and Plasma Mediums Under the Effect of Einstein–Gauss–Bonnet Gravity

Contact Info

Product

Resources

About

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results

Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87$$^$$ and Sgr. $$\hbox {A}^$$ results