Tests of loop quantum gravity from the event horizon telescope results of Sgr A
Abstract The Event Horizon Telescope (EHT) collaboration's image of the compact object at
the Galactic center is the first direct evidence of the supermassive black hole (BH) Sgr A …
the Galactic center is the first direct evidence of the supermassive black hole (BH) Sgr A …
[HTML][HTML] Light rings and shadows of static black holes in effective quantum gravity
W Liu, D Wu, J Wang - Physics Letters B, 2024 - Elsevier
Recently, two types of static black hole models that retain general covariance have been
proposed within the Hamiltonian constraint approach to effective quantum gravity (EQG). We …
proposed within the Hamiltonian constraint approach to effective quantum gravity (EQG). We …
Topology of critical points and Hawking-Page transition
Using the Bragg-Williams construction of an off-shell free energy, we calculate the
topological charge of the Hawking-Page transition point for black holes in anti–de Sitter. A …
topological charge of the Hawking-Page transition point for black holes in anti–de Sitter. A …
Topology of black hole thermodynamics in Gauss-Bonnet gravity
Thermodynamics of black holes in anti–de Sitter (AdS) spacetimes typically contain critical
points in the phase diagram, some of which correspond to the first order transition ending in …
points in the phase diagram, some of which correspond to the first order transition ending in …
[HTML][HTML] Universal thermodynamic topological classes of rotating black holes
XD Zhu, W Liu, D Wu - Physics Letters B, 2025 - Elsevier
In a recent study, Wei et al.(2024)[96] proposed a universal classification scheme that
interprets black hole solutions, including the four-dimensional Schwarzschild, Reissner …
interprets black hole solutions, including the four-dimensional Schwarzschild, Reissner …
Traversable wormholes and light rings
Ultracompact objects (UCOs) are horizonless compact objects that present light rings (LRs):
circular photon orbits. As a result, they could be black hole mimickers. Some years ago …
circular photon orbits. As a result, they could be black hole mimickers. Some years ago …
Topological classes of higher-dimensional black holes in massive gravity
D Chen, Y He, J Tao - The European Physical Journal C, 2023 - Springer
In this paper, we study topological numbers for five-, six-and seven-dimensional anti-de
Sitter black holes in the ghost-free massive gravity. We find that when the black holes are …
Sitter black holes in the ghost-free massive gravity. We find that when the black holes are …
Topology of critical points in boundary matrix duals
A bstract Computation of topological charges of the Schwarzschild and charged black holes
in AdS in canonical and grand canonical ensembles allows for a classification of the phase …
in AdS in canonical and grand canonical ensembles allows for a classification of the phase …
Topology of equatorial timelike circular orbits around stationary black holes
SW Wei, YX Liu - Physical Review D, 2023 - APS
A topological approach has been successfully used to study the properties of the light ring
and the null circular orbit in a generic black hole background. However, for the equatorial …
and the null circular orbit in a generic black hole background. However, for the equatorial …
Distinct topological configurations of equatorial timelike circular orbit for spherically symmetric (hairy) black holes
X Ye, SW Wei - Journal of Cosmology and Astroparticle Physics, 2023 - iopscience.iop.org
Topology is a promising approach toward to the light ring in a generic black hole
background, and equatorial timelike circular orbit in a stationary black hole background. In …
background, and equatorial timelike circular orbit in a stationary black hole background. In …