Axial gravitational quasinormal modes of a self-dual black hole in loop quantum gravity

Yang, Sen; Guo, Wen-Di; Tan, Qin; Liu, Yu-Xiao

doi:10.1103/physrevd.108.024055

Cited by 5 publications

(2 citation statements)

References 75 publications

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“…when √ a 0 ≪ r 0 and P ≪ 1. This assumption finds support in astrophysical observations [67]. Thus, we find a simpler shape function given by…”

Section: Case φ ′ (R) =supporting

confidence: 86%

Traversable wormholes from Loop Quantum Gravity

Cruz,

Neves,

Muniz

2024

J. Cosmol. Astropart. Phys.

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This study introduces and investigates Lorentzian traversable wormhole solutions rooted in Loop Quantum Gravity (LQG). The static and spherically symmetric solutions to be examined stem from the energy density sourcing self-dual regular black holes discovered by L. Modesto, relying on the parameters associated with LQG, which account for the quantum nature of spacetime. We specifically focus on macroscopic wormholes characterized by small values of these parameters. Our analysis encompasses zero-tidal solutions and those with non-constant redshift functions, exploring immersion diagrams, curvatures, energy conditions, equilibrium requirements, and the requisite quantity of exotic matter to sustain these wormholes. The investigation underscores the influence of LQG parameters on these features, highlighting the pivotal role of spacetime's quantum properties in shaping such objects and governing their behavior.

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“…when √ a 0 ≪ r 0 and P ≪ 1. This assumption finds support in astrophysical observations [67]. Thus, we find a simpler shape function given by…”

Section: Case φ ′ (R) =supporting

confidence: 86%

Traversable wormholes from Loop Quantum Gravity

Cruz,

Neves,

Muniz

2024

J. Cosmol. Astropart. Phys.

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“…The loop quantum gravity (LQG) elegantly resolves both the classical Big Bang and black hole singularities. Recently, a self-dual, regular, and static spacetime metric is obtained in the mini-superspace approach based on the polymerization procedure in LQG [9,11]. This self-dual spacetime is regular JCAP01(2024)059 and free of any spacetime curvature singularity.…”

Section: Introductionmentioning

confidence: 99%

Shadows of loop quantum black holes: semi-analytical simulations of loop quantum gravity effects on Sagittarius A* and M87*

Jiang,

Liu,

Dihingia

et al. 2024

J. Cosmol. Astropart. Phys.

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In this study, we delve into the observational implications of rotating Loop Quantum Black Holes (LQBHs) within an astrophysical framework. We employ semi-analytical General Relativistic Radiative Transfer (GRRT) computations to study the emission from the accretion flow around LQBHs. Our findings indicate that the increase of Loop Quantum Gravity (LQG) effects results in an enlargement of the rings from LQBHs, thereby causing a more circular polarization pattern in the shadow images. We make comparisons with the Event Horizon Telescope (EHT) observations of Sgr A* and M87*, which enable us to determine an upper limit for the polymetric function P in LQG. The upper limit for Sgr A* is 0.2, while for M87* it is 0.07. Both black holes exhibit a preference for a relatively high spin (a ≳ 0.5 for Sgr A* and 0.5 ≲ a ≲ 0.7 for M87*). The constraints for Sgr A* are based on black hole spin and ring diameter, whereas for M87*, the constraints are further tightened by the polarimetric pattern. In essence, our simulations provide observational constraints on the effect of LQG in supermassive black holes (SMBH), providing the most consistent comparison with observation.

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Quasinormal Modes of Dilaton Black Holes: Analytic Approximations

Malik

2024

Int J Theor Phys

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Axial gravitational quasinormal modes of a self-dual black hole in loop quantum gravity

Cited by 5 publications

References 75 publications

Traversable wormholes from Loop Quantum Gravity

Traversable wormholes from Loop Quantum Gravity

Shadows of loop quantum black holes: semi-analytical simulations of loop quantum gravity effects on Sagittarius A* and M87*

Quasinormal Modes of Dilaton Black Holes: Analytic Approximations

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