78 citations · 471 across the 16 of their papers we have counts for
15 papers · 1 filter
No-boundary wave function for two-field inflation
Dong-il Hwang, Soo A Kim, Dong-han Yeom
In this paper, we investigate the no-boundary wave function and the complex-valued instantons for two-field inflation models that have different masses. If there is a relatively ma…
Toward inflation models compatible with the no-boundary proposal
Dong-il Hwang, Dong-han Yeom
In this paper, we investigate various inflation models in the context of the no-boundary proposal. We propose that a good inflation model should satisfy three conditions: observati…
Euclidean quantum gravity and stochastic inflation
Dong-il Hwang, Bum-Hoon Lee, Ewan D. Stewart +2
In this paper, we compare dispersions of a scalar field in Euclidean quantum gravity with stochastic inflation. We use Einstein gravity and a minimally coupled scalar field with a…
No-boundary measure and preference for large e-foldings in multi-field inflation
Dong-il Hwang, Soo A Kim, Bum-Hoon Lee +2
The no-boundary wave function of quantum gravity usually assigns only very small probability to long periods of inflation. This was a reason to doubt about the no-boundary wave fun…
The no-boundary measure in string theory: Applications to moduli stabilization, flux compactification, and cosmic landscape
Dong-il Hwang, Bum-Hoon Lee, Hanno Sahlmann +1
We investigate the no-boundary measure in the context of moduli stabilization. To this end, we first show that for exponential potentials, there are no classical histories once the…
Bubble collision with gravitation
Dong-il Hwang, Bum-Hoon Lee, Wonwoo Lee +1
In this paper, we study vacuum bubble collisions with various potentials including gravitation, assuming spherical, planar, and hyperbolic symmetry. We use numerical calculations f…