310 citations · 1.2k across the 34 of their papers we have counts for
34 papers
Large-scale inhomogeneity of dark energy produced in the ancestor vacuum
Yue Nan, Kazuhiro Yamamoto, Hajime Aoki +2
We investigate large-scale inhomogeneity of dark energy in the bubble nucleation scenario of the universe. In this scenario, the present universe was created by a bubble nucleation…
Observational signatures of dark energy produced in an ancestor vacuum: Forecast for galaxy surveys
Daisuke Yamauchi, Hajime Aoki, Satoshi Iso +3
We study observational consequences of the model for dark energy proposed in [1] (Aoki et al., Phys.Rev. D97 (2018) no.4, 043517). We assume our universe has been created by bubble…
Vacuum fluctuations in an ancestor vacuum: A possible dark energy candidate
Hajime Aoki, Satoshi Iso, Da-Shin Lee +2
We consider an open universe created by bubble nucleation, and study possible effects of an "ancestor vacuum" (de Sitter space in which bubble nucleation occurred) on the present u…
Evolution of Vacuum Fluctuations of an Ultra-Light Massive Scalar Field generated during and before Inflation
Hajime Aoki, Satoshi Iso
We consider an ultra-light scalar field with a mass comparable to (or lighter than) the Hubble parameter of the present universe, and calculate the time evolution of the energy-mom…
Phenomenological studies in the matrix models
Hajime Aoki
Matrix models are a promising candidate for a nonperturbative formulation of the superstring theory. It is possible to study how the standard model and other phenomenological model…
Evolution of vacuum fluctuations generated during and before inflation
Hajime Aoki, Satoshi Iso, Yasuhiro Sekino
We calculate the time evolution of the expectation value of the energy-momentum tensor for a minimally-coupled massless scalar field in cosmological spacetimes, with an application…