31 citations · 60 across the 8 of their papers we have counts for
8 papers
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…
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…
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…
Notes on the post-bounce background dynamics in bouncing cosmologies
Ok Song An, Jin U Kang, Thae Hyok Kim +1
We investigate the post-bounce background dynamics in a certain class of single bounce scenarios studied in the literature, in which the cosmic bounce is driven by a scalar field w…
Quantum consistency in supersymmetric theories with -symmetry in curved space
Ok Song An, Jin U Kang, Jong Chol Kim +1
We discuss consistency at the quantum level in the rigid supersymmetric field theories with a symmetry in four-dimensional curved space which are formulated…
Super-Weyl Anomaly from Holography and Rigid Supersymmetry Algebra on Two-Sphere
Ok Song An, Yong Hae Ko, Sok-Hyon Won
Operators transform anomalously under the symmetry in the presence of quantum anomalies. We study this aspect of the super-Weyl anomaly in superconformal field t…
Anomaly-corrected supersymmetry algebra and supersymmetric holographic renormalization
Ok Song An
We present a systematic approach to supersymmetric holographic renormalization for a generic 5D gauged supergravity theory with matter multiplets, including its fer…
Black hole thermodynamics from a variational principle: Asymptotically conical backgrounds
Ok Song An, Mirjam Cvetič, Ioannis Papadimitriou
The variational problem of gravity theories is directly related to black hole thermodynamics. For asymptotically locally AdS backgrounds it is known that holographic renormalizatio…