204 citations · 1.6k across the 61 of their papers we have counts for
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Instability thresholds for de Sitter and Minkowski spacetimes in holographic semiclassical gravity
Akihiro Ishibashi, Kengo Maeda, Takashi Okamura
We study the stability of -dimensional () de Sitter and Minkowski spacetimes within the framework of semiclassical gravity sourced by a strongly coupled quantum field w…
Energy Conditions and Quantum Information
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda +2
The concept of energy lies at the foundation of physical science. In general relativity and quantum field theory, the positivity and conservation of energy are encapsulated by the…
The higher dimensional instabilities of AdS in holographic semiclassical gravity
Akihiro Ishibashi, Kengo Maeda, Takashi Okamura
In the framework of AdS/CFT duality, we consider the semiclassical problem in general quadratic theory of gravity. We construct asymptotically global AdS and hyperbolic~(topologica…
Symmetry breaking of -dimensional AdS in holographic semiclassical gravity
Akihiro Ishibashi, Kengo Maeda, Takashi Okamura
We show that -dimensional AdS spacetime can be semiclassically unstable due to strongly interacting quantum field effects. In our previous paper, we have pointed out the possibi…
Flows of Rotating Extremal Attractor Black Holes
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We investigate the attractor mechanism of five-dimensional extremal rotating black holes in Einstein gravity minimally coupled with a multiplet complex scalar. By imposing regulari…
Semiclassical Einstein equations from holography and boundary dynamics
Akihiro Ishibashi, Kengo Maeda, Takashi Okamura
In this paper, we consider how to formulate semiclassical problems in the context of the AdS/CFT correspondence, based on the proposal of Compere and Marolf. Our prescription invol…
Flows of Extremal Attractor Black Holes
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We study flows of non-supersymmetric attractor black holes in the context of gauge/gravity correspondence. As our bulk theory, we consider the Einstein-Maxwell-Dilaton system with…
The averaged null energy condition on holographic evaporating black holes
Akihiro Ishibashi, Kengo Maeda
We examine the averaged null energy condition~(ANEC) for strongly coupled fields, along the event horizon of an evaporating black hole by using the AdS/CFT duality. First, we consi…
Is quantum teleportation beyond horizon possible?
Jun-ichirou Koga, Kengo Maeda
We ask whether quantum teleportation from the outside to the inside of a horizon is possible, using entanglement extracted from a vacuum. We first calculate analytically, within th…
The first law of entanglement entropy in AdS black hole backgrounds
Akihiro Ishibashi, Kengo Maeda
The first law for entanglement entropy in CFT in an odd-dimensional asymptotically AdS black hole is studied by using the AdS/CFT duality. The entropy of CFT considered here is due…
The averaged null energy conditions in even dimensional curved spacetimes from AdS/CFT duality
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We consider averaged null energy conditions (ANEC) for strongly coupled quantum field theories in even (two and four) dimensional curved spacetimes by applying the no-bulk-shortcut…
Conformally invariant averaged null energy condition from AdS/CFT
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We study the compatibility of the AdS/CFT duality with the bulk and boundary causality, and derive a conformally invariant averaged null energy condition (CANEC) for quantum field…
Achronal ANEC, Weak Cosmic Censorship, and AdS/CFT duality
Akihiro Ishibashi, Kengo Maeda, Eric Mefford
We examine the achronal averaged null energy condition~(ANEC) for a class of conformal field theories~(CFT) at strong coupling in curved spacetime. By applying the AdS/CFT duality,…
Violation of the quantum null-energy condition in a holographic wormhole and infrared effects
Akihiro Ishibashi, Kengo Maeda, Eric Mefford
We examine the quantum null energy condition (QNEC) for a -dimensional conformal field theory (CFT) at strong coupling in the background of a wormhole spacetime by employing t…
Cosmic Censorship at Large D: Stability analysis in polarized AdS black branes (holes)
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We test the cosmic censorship conjecture for a class of polarized AdS black branes (holes) in the Einstein-Maxwell theory at large number of dimensions . We first derive a new s…
Supersymmetry in a dynamical M-brane background
Kengo Maeda, Kunihito Uzawa
The supersymmetry arises in certain theories of fermions coupled to gauge fields and gravity in a spacetime of 11 dimensions. The dynamical brane background has mainly been studied…
A holographic stress-energy tensor near the Cauchy horizon inside a rotating black hole
Akihiro Ishibashi, Kengo Maeda, Eric Mefford
We investigate a stress-energy tensor for a CFT at strong coupling inside a small five-dimensional rotating Myers-Perry black hole with equal angular momenta by using the holograph…
Holographic superfluid flows with a localized repulsive potential
Akihiro Ishibashi, Kengo Maeda, Takashi Okamura
We investigate a holographic model of superfluid flows with an external repulsive potential. When the strength of the potential is sufficiently weak, we analytically construct two…
Violation of cosmic censorship in dynamical -brane systems
Kengo Maeda, Kunihito Uzawa
We study the cosmic censorship of dynamical -brane systems in a -dimensional background. This is the generalization of the analysis in the Einstein-Maxwell-dilaton theory, wh…
A rotating hairy AdS3 black hole with the metric having only one Killing vector field
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We perturbatively construct a three-dimensional rotating AdS black hole with a real scalar hair. We choose the mass of a scalar field slightly above the Breitenlohner-Freedman boun…
A No Black Hole Theorem
Gavin S. Hartnett, Gary T. Horowitz, Kengo Maeda
We show that one cannot put a stationary (extended) black hole inside certain gravitating flux-tubes. This includes an electric flux-tube in five-dimensional Einstein-Maxwell theor…
Can a stationary Bianchi black brane have momentum along the direction with no translational symmetry?
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
Bianchi black branes (black brane solutions with homogeneous but anisotropic horizons classified by the Bianchi type) provide a simple holographic setting with lattice structures t…
A holographic superconductor model in a spatially anisotropic background
Jun-ichirou Koga, Kengo Maeda, Kentaro Tomoda
We investigate an anisotropic model of superconductors in the Einstein-Maxwell-dilaton theory with a charged scalar field. It is found that the critical temperature decreases as th…
Persistent Superconductor Currents in Holographic Lattices
Norihiro Iizuka, Akihiro Ishibashi, Kengo Maeda
We consider a persistent superconductor current along the direction with no translational symmetry in a holographic gravity model. Incorporating a lattice structure into the model,…