35 citations · 158 across the 12 of their papers we have counts for
7 papers · 1 filter
Curvature perturbation spectrum from false vacuum inflation
Jinn-Ouk Gong, Misao Sasaki
In the inflationary cosmology it occurs frequently that the inflaton field is trapped in a local, transient minimum with non-zero vacuum energy. The difficulty regarding the curvat…
The lessons from the running of the tensor-to-scalar ratio
Jinn-Ouk Gong
We derive a simple consistency relation from the running of the tensor-to-scalar ratio. This new relation is first order in the slow-roll approximation. While for single field mode…
Generation of perturbation after multi-field inflation
Jinn-Ouk Gong
We explore a new possibility that some inflaton fields in multi-field inflation models satisfy the observed value of the spectral index so that the curvature perturbation generated…
Multiple scalar particle decay and perturbation generation
Ki-Young Choi, Jinn-Ouk Gong
We study the evolution of the universe which contains a multiple number of non-relativistic scalar fields decaying into both radiation and pressureless matter. We present a powerfu…
Dark energy in hybrid inflation
Jinn-Ouk Gong, Seongcheol Kim
The situation that a scalar field provides the source of the accelerated expansion of the universe while rolling down its potential is common in both the simple models of the primo…
Breaking scale invariance from a singular inflaton potential
Jinn-Ouk Gong
In this paper we break the scale invariance of the primordial power spectrum of curvature perturbations of inflation. Introducing a singular behaviour due to spontaneous symmetry b…