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hep-th2025
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…
hep-th2025
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…