On the Topology of Black Lenses (2009)
The topological structure of the black holes in 5-dimensional space-times with a horizon diffeomorphic with the lens space has been discussed. It has been shown that such a black hole can emerge from...
Half period theorem of binary black holes (2008)
Merging event horizons of the binary black holes will be investigated. Though recent development of the numerical study of the binary black hole coalescence has shown that their apparent horizons can...
ROTATING BLACK HOLES/RINGS AT FUTURE COLLIDERS (2007)
The hierarchy between the electroweak and Planck scales can be reduced when the extra dimensions are compactified with large volume or with warped geometry, resulting in the fundamental scale of the...
New instability in relativistic cylindrically symmetric system (2007)
Nakao, Ken-ichi, Ida, Daisuke, Kurita, Yasunari
We investigate an infinitesimally thin cylindrical shell composed of counter-rotating dust particles. This system was studied by Apostolatos and Thorne in terms of the C-energy for a bounded domain....
Topology Change of Black Holes (2007)
The topological structure of the event horizon has been investigated in terms of the Morse theory. The elementary process of topological evolution can be understood as a handle attachment. It has...
Cosmological Black Holes on Taub-NUT space in Five-Dimensional Einstein-Maxwell Theory (2007)
Ida, Daisuke, Ishihara, Hideki, Kimura, Masashi, Matsuno, Ken, Morisawa, Yoshiyuki, Tomizawa, Shinya
The cosmological black hole solution on the Gibbons-Hawking space has been constructed. We also investigate the properties of this solution in the case of a single black hole. Unlike the...
Rotating Black Holes at Future Colliders. III. Determination of Black Hole Evolution (2006)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
TeV scale gravity scenario predicts that the black hole production dominates over all other interactions above the scale and that the Large Hadron Collider will be a black hole factory. Such higher...
Rotating black holes at future colliders II: Anisotropic scalar field emission (2005)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
This is the sequel to the first paper of the series, where we have discussed the Hawking radiation from five-dimensional rotating black holes for spin 0, 1/2 and 1 brane fields in the low frequency...
Hoop Conjecture in Five-dimensios -Violation of Cosmic Censorship- (2005)
Yoo, Chul-Moon, Nakao, Ken-ichi, Ida, Daisuke
We study the condition of black hole formation in five-dimensional space-time. We analytically solve the constraint equations of five-dimensional Einstein equations for momentarily static and...
Anisotropic scalar field emission from TeV scale black hole (2005)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
Black holes are predicted to be copiously produced at the CERN Large Hadron Collider in the scenarios of TeV scale gravity. We report recent progress in studying decay of such a higher dimensional...
Scalar field perturbation on six-dimensional ultra-spinning black holes (2004)
Morisawa, Yoshiyuki, Ida, Daisuke
We have studied the scalar field perturbations on six-dimensional ultra-spinning black holes. We have numerically calculated the quasinormal modes of rotating black holes. Our results suggest that...
A boundary value problem for the five-dimensional stationary rotating black holes (2004)
Morisawa, Yoshiyuki, Ida, Daisuke
We study the boundary value problem for the stationary rotating black hole solutions to the five-dimensional vacuum Einstein equation. Assuming the two commuting rotational symmetry and the...
Rotating Black Holes at Future Colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We consider the production and decay of TeV-scale black holes. Evaluation of the production cross section of higher dimensional rotating black holes is made. The master field equation for general...
Rotating Black Holes/Rings at Future Colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
The hierarchy between the electroweak and Planck scales can be reduced when the extra dimensions are compactified with large volume or with warped geometry, resulting in the fundamental scale of the...
Black Holes at future colliders (2003)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We consider the production and decay of TeV sized black holes. After discussing evaluation of the production cross section of higher dimensional rotating black holes and black rings, the master...
Kinematical bound in asymptotically translationally invariant spacetimes (2003)
Shiromizu, Tetsuya, Ida, Daisuke, Tomizawa, Shinya
We present positive energy theorems in asymptotically translationally invariant spacetimes which can be applicable to black strings and charged branes. We also address the bound property of the...
Stationary Einstein-Maxwell fields in arbitrary dimensions (2003)
The Einstein-Maxwell equations in D-dimensions admitting (D-3) commuting Killing vector fields have been investigated. The existence of the electric, magnetic and twist potentials have been proved....
Rotating black holes at future colliders: Greybody factors for brane fields (2002)
Ida, Daisuke, Oda, Kin-ya, Park, Seong Chan
We study theoretical aspects of the rotating black hole production and evaporation in the extra dimension scenarios with TeV scale gravity, within the mass range in which the higher dimensional Kerr...
The scalar perturbation of the higher-dimensional rotating black holes (2002)
Ida, Daisuke, Uchida, Yuki, Morisawa, Yoshiyuki
The massless scalar field in the higher-dimensional Kerr black hole (Myers- Perry solution with a single rotation axis) has been investigated. It has been shown that the field equation is separable...
Thick domain walls around a black hole (2002)
Morisawa, Yoshiyuki, Ida, Daisuke, Ishibashi, Akihiro, Nakao, Ken-ichi
We discuss the gravitationally interacting system of a thick domain wall and a black hole. We numerically solve the scalar field equation in the Schwarzschild spacetime and obtain a sequence of...
Uniqueness of (dilatonic) charged black holes and black p-branes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove the uniqueness of higher dimensional (dilatonic) charged black holes in static and asymptotically flat spacetimes for arbitrary vector-dilaton coupling constant. An application to the...
Uniqueness and non-uniqueness of static black holes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove a uniqueness theorem for asymptotically flat static charged dilaton black hole solutions in higher dimensional space-times. We also construct infinitely many non-asymptotically flat regular...
Isoperimetric inequality for higher-dimensional black holes (2002)
The initial data sets for the five-dimensional Einstein equation have been examined. The system is designed such that the black hole ($\simeq S^3$) or the black ring ($\simeq S^2\times S^1$) can be...
Uniqueness and non-uniqueness of static vacuum black holes in higher dimensions (2002)
Gibbons, Gary W., Ida, Daisuke, Shiromizu, Tetsuya
We prove the uniqueness theorem for asymptotically flat static vacuum black hole solutions in higher dimensional space-times. We also construct infinitely many non-asymptotically flat regular static...
Gravitational energy, dS/CFT correspondence and cosmic no-hair (2001)
Shiromizu, Tetsuya, Ida, Daisuke, Torii, Takashi
The gravitational energy is examined in asymptotically de Sitter space-times. The positivity will be shown for certain cases. The de Sitter/CFT(dS/CFT) correspondence recently proposed and cosmic...
Semiclassical instability of the brane-world: Randall-Sundrum bubbles (2001)
Ida, Daisuke, Shiromizu, Tetsuya, Ochiai, Hirotaka
We discuss the semiclassical instability of the Randall-Sundrum brane-world model against a creation of a kind of Kaluza-Klein bubble. An example describing such a bubble space-time is constructed...
Stability of $AdS_p x S^n x S^{q-n}$ Compactifications (2001)
Shiromizu, Tetsuya, Ida, Daisuke, Ochiai, Hirotaka, Torii, Takashi
We examine the stability of ${\rm AdS}_p \times {\rm S}^n \times {\rm S}^{q-n}$. The initial data constructed by De Wolfe et al \cite{Gary} has been carefully analyised and we have confirmed that...
Black holes in three-dimensional Einstein-Born-Infeld-dilaton theory (2001)
The three-dimensional static and circularly symmetric solution of the Einstein-Born-Infeld-dilaton system is derived. The solutions corresponding to low energy string theory are investigated in...
Brane-World and Holography (2001)
Shiromizu, Tetsuya, Torii, Takashi, Ida, Daisuke
We consider the brane-world in the holographic point of view. Bearing the realistic models in mind, the bulk massless scalar field is introduced. First of all, we find the constraint on the coupling...
Anti-de Sitter no-hair, AdS/CFT and the brane-world (2001)
Shiromizu, Tetsuya, Ida, Daisuke
We study the asymptotic behavior of the bulk spacetimes with the negative cosmological constant in the context of the brane-world scenario. We show that, in Euclidean bulk, or in Lorentzian static...
Hidden symmetry of the three-dimensional Einstein-Maxwell equations (2001)
Ida, Daisuke, Morisawa, Yoshiyuki
It is shown how to generate three-dimensional Einstein-Maxwell fields from known ones in the presence of a hypersurface-orthogonal non-null Killing vector field. The continuous symmetry group is...
Instability of a membrane intersecting a black hole (2000)
Higaki, Susumu, Ishibashi, Akihiro, Ida, Daisuke
The stability of a Nambu-Goto membrane at the equatorial plane of the Reissner-Nordstr{\o}m-de Sitter spacetime is studied. The covariant perturbation formalism is applied to study the behavior of...
No Black Hole Theorem in Three-Dimensional Gravity (2000)
A common property of known black hole solutions in (2+1)-dimensional gravity is that they require a negative cosmological constant. In this letter, it is shown that a (2+1)-dimensional gravity theory...
Thick Domain Walls Intersecting a Black Hole (2000)
Morisawa, Yoshiyuki, Yamazaki, Ryo, Ida, Daisuke, Ishibashi, Akihiro, Nakao, Ken-ichi
We discuss the gravitationally interacting system of a thick domain wall and a black hole. We numerically solve the scalar field equation in the Schwarzschild spacetime and show that there exist...
How Do Nonlinear Voids Affect Light Propagation ? (1999)
Sugiura, Norimasa, Nakao, Ken-ichi, Ida, Daisuke, Sakai, Nobuyuki, Ishihara, Hideki
Propagation of light in a clumpy universe is examined. As an inhomogeneous matter distribution, we take a spherical void surrounded by a dust shell where the ``lost mass'' in the void is compensated...
A simple model of the brane-world cosmology has been proposed, which is characterized by four parameters, the bulk cosmological constant, the spatial curvature of the universe, the radiation strength...
Static charged perfect fluid with the Weyl-Majumdar relation (1999)
Static charged perfect fluid distributions have been studied. It is shown that if the norm of the timelike Killing vector and the electrostatic potential have the Weyl-Majumdar relation, then the...
How much negative energy does a wormhole need? (1999)
Ida, Daisuke, Hayward, Sean A.
It is known that traversible wormholes require negative energy density. We here argue how much negative energy is needed for wormholes, using a local analysis which does not assume any symmetry. and...