9 papers
Consistency in the Quantum-Improved Charged Black Holes
Chiang-Mei Chen, Akihiro Ishibashi, Nobuyoshi Ohta
We investigate the consistency in the thermodynamics and the approaches at the equation and action levels for the quantum-improved charged black holes with scale-dependent coupling…
Bianchi-I Cosmology with Radiation in Asymptotically Safe Gravity
Chiang-Mei Chen, Ting-Kui Fan, Rituparna Mandal +1
We study the late-time evolution of an anisotropic Bianchi-I universe with radiation in the framework of asymptotically safe gravity. We first discuss the radiation-dominated unive…
Shadow of rotating black holes with consistent thermodynamics
Che-Yu Chen, Chiang-Mei Chen, Nobuyoshi Ohta
Quantum effects in general induce scale dependence in the coupling constants. We explore this possibility in gravity, with a scale-dependent Newton coupling. When applied to Kerr b…
Noncritical Conformal Gravity and Four-Dimensional Liouville Theory
Hikaru Kawai, Nobuyoshi Ohta
We study the quantum aspects of the conformal gravity in four dimensions, specifically addressing a known discrepancy in beta functions between general quadratic curvature theories…
Bianchi-I cosmology with scale dependent and in asymptotically safe gravity
Chiang-Mei Chen, Akihiro Ishibashi, Rituparna Mandal +1
We study anisotropic Bianchi-I cosmology, incorporating quantum gravitational corrections into the Einstein equation through the scale-dependent Newton coupling and cosmological te…
On the Cutoff Scale Identification of FLRW Cosmology in Asymptotically Safe Gravity
Chiang-Mei Chen, Rituparna Mandal, Nobuyoshi Ohta
We examine Friedmann-Lemaître-Robertson-Walker cosmology, incorporating quantum gravitational corrections through the functional renormalization group flow of the effective action…