7 citations · 11 across the 9 of their papers we have counts for
10 papers
Quasinormal modes of Kerr-Newman-de Sitter black holes from Heun connection formulae
Hideo Furugori, Naotaka Kubo, Hayato Motohashi +1
We study quasinormal modes governed by the Teukolsky equation in Kerr-Newman-de Sitter spacetime, formally treating the spin weight and field charge as arbitrary parameters. We use…
Generalized Black Holes with Fully Non-aligned Electromagnetic Fields
Hideo Furugori, Shinya Tomizawa
We develop a Plebański--Demiański-adapted parametrization of the general Ovcharenko--Podolský solution and construct new families of generalized black holes in four-dimensional Ein…
Multi-rotating black holes with non-aligned angular momenta in 5D Kaluza-Klein theory
Shinya Tomizawa, Hideo Furugori, Jun-ichi Sakamoto +1
We present an exact solution describing multi-rotating black holes in 4D Einstein-Maxwell-dilaton theory, which can be obtained from 5D Kaluza--Klein theory via dimensional reducti…
Multi--black holes in Bertotti--Robinson spacetime
Hideo Furugori, Jun-ichi Sakamoto, Shinya Tomizawa
We construct a new class of exact solutions describing multi-black holes in the Bertotti--Robinson spacetime, using the monodromy-matrix formalism associated with integrable sigma…
Trapped Surface as a Cosmic Censor
Hideo Furugori, Daisuke Yoshida, Kaho Yoshimura
We formulate a local geometric criterion for weak cosmic censorship in black hole overcharging and overspinning thought experiments. Under the null convergence and generic conditio…
Bridging dS/CFT and Celestial Holography via Ward-Takahashi Identities
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
In 2507.17558, we provide a map from a scalar theory on -dimensional Minkowski spacetime to a scalar theory with a continuous mass spectrum on -dimensional de Sitter…
Celestial Holography meets dS/CFT
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
We provide a concrete link between celestial amplitudes and cosmological correlators. We first construct a map from quantum field theories (QFTs) in -dimensional Euclidean s…
Apparent Horizons Associated with Dynamical Black Hole Entropy
Hideo Furugori, Kanji Nishii, Daisuke Yoshida +1
We define entropic marginally outer trapped surfaces (E-MOTSs) as a generalization of apparent horizons. We then show that, under first-order perturbations around a stationary blac…
Celestial two-point functions and rectified dictionary
Hideo Furugori, Naoki Ogawa, Sotaro Sugishita +1
A naive celestial dictionary causes massless two-point functions to take the delta-function forms in the celestial conformal field theory (CCFT). We rectify the dictionary, involvi…
Dressed-Asymptotic States and QED Infrared Physics
Hideo Furugori, Shin'ichi Nojiri
The dressed state formalisms, which incorporate interactions of soft particles into an asymptotic state, are known as the prescriptions expected to solve the problem of infrared (I…