1 citations · 1 across the 9 of their papers we have counts for
10 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…
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…
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…
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…
Essential Renormalization Group Equation for Gravity coupled to a Scalar field
Nobuyoshi Ohta, Masatoshi Yamada
We study the essential renormalization group equation, in which inessential couplings are removed via field redefinitions, for Einstein gravity coupled to a massive scalar field in…
Standard Running, "Physical Running", Cosmological Constant and Newton Coupling
Hikaru Kawai, Nobuyoshi Ohta
Recently it is asserted that the standard beta function does not describe the correct running of the coupling constant in some theories. We show that the problem arises from the as…
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…
Wave Function Renormalization in Asymptotically Safe Quantum Gravity
Hikaru Kawai, Nobuyoshi Ohta
We discuss the effect of wave function renormalization (WFR) in asymptotically safe gravity. We show that there are two WFR-invariant quantities, and the renormalization (RG) equat…
An Observation on the Beta Functions in Quadratic Gravity
Hikaru Kawai, Nobuyoshi Ohta
We study the beta functions for the dimensionless couplings in quadratic curvature gravity, and find that there is a simple argument to restrict the possible form of the beta funct…