12 citations · 42 across the 6 of their papers we have counts for
6 papers
Big-Bang Nucleosynthesis on a bubble universe nucleated in Kerr-AdS Black Hole
Akira Dohi, Issei Koga, Kazushige Ueda
We present the Big-Bang Nucleosynthesis (BBN) simulation with a bubble universe scenario around a rotating black hole (BH) in Kerr-AdS spacetime to explain recently updated obs…
dS universe emergent from Kerr-AdS spacetime: bubble nucleation catalyzed by a black hole
Issei Koga, Naritaka Oshita, Kazushige Ueda
The emergence of a four-dimensional de Sitter (dS) universe on an expanding bubble in the five-dimensional anti-de Sitter (AdS) background has been suggested as a possi…
Global study of the scalar quasi-normal modes of Kerr-AdS black holes: Stability, thermality, and horizon area quantization
Issei Koga, Naritaka Oshita, Kazushige Ueda
We numerically explore the structure of quasi-normal (QN) frequencies of the five-dimensional small and large Kerr-anti de Sitter (Kerr-AdS) black hole with equal and unequal…
Catalytic Creation of Bubble Universe Induced by Quintessence in Five Dimensions
Issei Koga, Yutaka Ookouchi
We investigate the bubble nucleation in five dimensional spacetime catalyzed by quintessence. We especially focus on decay of a metastable Minkowski vacuum to an anti-de Sitter vac…
Instability of Higgs Vacuum via String Cloud
Issei Koga, Sachiko Kuroyanagi, Yutaka Ookouchi
We study the instability of the Higgs vacuum caused by a cloud of strings. By catalysis, the decay rate of the vacuum is highly enhanced and, when the energy density of the cloud i…
Catalytic Creation of Baby Bubble Universe with Small Positive Cosmological Constant
Issei Koga, Yutaka Ookouchi
We investigate the decay of metastable de Sitter, Minkowski and anti-de Sitter vacua catalyzed by a black hole and a cloud of strings. We apply the method to the creation of the fo…