204 citations · 1.6k across the 61 of their papers we have counts for
62 papers
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…