3 papers
gr-qc2026
Cosmic Inflation From Regular Black Holes
Kensuke Sueto, Riku Yoshimoto, Pablo A. Cano
We study braneworld cosmology in quasi-topological gravity (QTG) with an infinite tower of higher-curvature terms, focusing on the case in which the bulk admits regular black hole…
hep-th2025
Detector Based Evaluation of Extractable Entanglement in Flat spacetime
Hiromasa Tajima, Riku Yoshimoto, Ryo Nemoto +1
Entanglement entropy (EE) is widely used to quantify quantum correlations in field theory, with the well-known result in two-dimensional conformal field theory (CFT) predicting a l…
gr-qc2025
Entanglement Harvesting from Quantum Field: Insights via the Partner Formula
Yuki Osawa, Yasusada Nambu, Riku Yoshimoto
We examine the condition necessary for extracting entanglement from a quantum field through the use of two local modes A and B (detector modes). We show that Simon's entanglement c…