70 citations · 976 across the 93 of their papers we have counts for
6 papers · 1 filter
Classical Geometry of De Sitter Spacetime : An Introductory Review
Yoonbai Kim, Chae Young Oh, Namil Park
Classical geometry of de Sitter spacetime is reviewed in arbitrary dimensions. Topics include coordinate systems, geodesic motions, and Penrose diagrams with detailed calculations.
Rolling Tachyons in String Cosmology
Chanju Kim, Hang Bae Kim, Yoonbai Kim
We study the role of rolling tachyons in the cosmological model with dilatonic gravity. In the string frame, flat space solutions of both initial-stage and late-time are obtained i…
Chiral primary cubic interactions from pp-wave supergravity
Youngjai Kiem, Yoonbai Kim, Jaemo Park +1
We explicitly construct cubic interaction light-cone Hamiltonian for the chiral primary system involving the metric fields and the self-dual four-form fields in the IIB pp-wave sup…
Vacuum Structure and Global Strings with Conical Singularities
Yoonbai Kim, O-Kab Kwon, Jongsu Sohn
Vacuum structure and global cosmic strings are analyzed in the effective theory of self-interacting O(2) scalar fields on (3+1)-manifolds with conical singularities. In the context…
PP-wave/Yang-Mills Correspondence: An Explicit Check
Youngjai Kiem, Yoonbai Kim, Sangmin Lee +1
We present an explicit evidence that shows the correspondence between the type IIB supergravity in the pp-wave background and its dual supersymmetric Yang-Mills theory at the inter…
First and Second Order Vortex Dynamics
Yoonbai Kim, Kimyeong Lee
The low energy dynamics of vortices in selfdual Abelian Higgs theory is of second order in vortex velocity and characterized by the moduli space metric. When Chern-Simons term with…