13 papers
Black Hole Entropy and Holographic Entanglement Entropy in DGP Brane Gravity
Takamasa Kanai
We investigate the relation between gravitational entropy and holographic entanglement entropy in braneworld gravity with gravitational dynamics localized on the brane. We first co…
On the (In)equivalence of de Sitter and Holographic Entanglement Entropies in Lovelock Gravity
Takamasa Kanai
We investigate the relation between de Sitter entropy and holographic entanglement entropy in higher-curvature gravity and its braneworld realization. Using the canonical formulati…
Distinguishing Dymnikova and Schwarzschild Black Holes through Gravitational Lensing with EFT-Corrected Photon Propagation
Takamasa Kanai
We investigate whether a Dymnikova regular black hole can be observationally distinguished from a Schwarzschild black hole through strong gravitational lensing, taking into account…
Gravitational Lensing of Hayward Black Holes with EFT-Corrected Photon Propagation
Takamasa Kanai
We investigate whether a Hayward regular black hole can be observationally distinguished from a Schwarzschild black hole through strong gravitational lensing when effective field t…
EFT Corrections to Photon Propagation and Gravitational Lensing in an Ellis-Bronnikov Wormhole
Takamasa Kanai
We investigate strong gravitational lensing by an Ellis-Bronnikov (EB) wormhole in the presence of effective field theory (EFT) corrections to photon propagation. We derive the mod…
Analytical Study of Deflection Angle and Time Delay in Kerr Spacetime with Modified Propagation
Takamasa Kanai
We investigate gravitational lensing in Kerr spacetime in the presence of a modified photon propagation law arising from higher-curvature effective field theory corrections. Adopti…
Polarization-Dependent Photon Propagation, Quasinormal Modes, and Gravitational Lensing in Higher-Curvature Effective Theories
Takamasa Kanai
We investigate the impact of higher-curvature corrections on photon propagation within an effective field theory framework and their observational consequences in strong gravitatio…
Probing Effective Field Theory Corrections with Quasinormal Modes and Gravitational Lensing in Reissner-Nordström Black Holes
Takamasa Kanai
Effective field theory (EFT) provides a systematic framework for parametrizing possible higher-energy corrections to general relativity through higher-curvature interactions. In th…
Photon Surfaces in Higher-Curvature Gravity: Implications for Quasinormal Modes and Gravitational Lensing
Takamasa Kanai
Effective field theory (EFT) provides a systematic framework to describe deviations from general relativity through higher-curvature corrections to the gravitational action. In thi…
Quantum Dynamics of the Schwarzschild Interior in Ashtekar-Barbero Variables with Minimal Length Effects
Takamasa Kanai
We study the quantum dynamics of the Schwarzschild interior in the Ashtekar-Barbero formulation, focusing on the fate of the classical singularity and the annihilation-to-nothing s…
Wheeler-DeWitt Equation for Black Hole Interiors in Asymptotically Safe Gravity
Takamasa Kanai
In this work, we analyze the Wheeler-DeWitt equation with scale-dependent gravitational couplings within the framework of asymptotically safe gravity. In the Hamiltonian formulatio…
Ultraviolet Behavior of the Wheeler-DeWitt Equation in Horava-Lifshitz Gravity
Takamasa Kanai
We investigate the quantum structure of black hole interiors in Horava-Lifshitz gravity by analyzing the Wheeler-DeWitt equation in minisuperspace. Focusing on the ultraviolet regi…
Higher curvature corrections to the black hole Wheeler-DeWitt equation and the annihilation to nothing scenario
Takamasa Kanai
We revisit Yeom's annihilation-to-nothing scenario using a modified Wheeler-DeWitt (WDW) equation incorporating higher-curvature corrections. We show that, once these corrections a…