3 papers
hep-th2026
Non-Gaussianity and Strong-Coupling Problem in a Two-Field DHOST Bouncing Model
Ok Song An, Kon Hong, Jin U Kang +1
We recently constructed a two-field Degenerate Higher-Order Scalar-Tensor (DHOST) bouncing model which is fully viable at the linear level [1]. This model is completely free of Bel…
hep-th2025
Fully viable DHOST bounce with extra scalar
Ok Song An, Jin U Kang, Yong Jin Kim +2
In this paper we construct a class of Degenerate Higher-Order Scalar-Tensor (DHOST) theories with an extra scalar field, which admits viable solutions of bouncing universe satisfyi…
hep-th2025
Bridging between reheating and late-time observations in quintessential inflation
Ok Song An, Jin U Kang, Yong Jin Kim +1
We propose an idea to build a bridge between reheating and late-time observations in quintessential inflation by backtracking the evolution of the inflaton field from the present t…