23 citations · 127 across the 15 of their papers we have counts for
15 papers
Topology Change of Spacetime and Resolution of Spacetime Singularity in Emergent Gravity
Sunggeun Lee, Raju Roychowdhury, Hyun Seok Yang
Emergent gravity is based on the Darboux theorem or the Moser lemma in symplectic geometry stating that the electromagnetic force can always be eliminated by a local coordinate tra…
Test of Emergent Gravity
Sunggeun Lee, Raju Roychowdhury, Hyun Seok Yang
In this paper we examine a small but detailed test of the emergent gravity picture with explicit solutions in gravity and gauge theory. We first derive symplectic U(1) gauge fields…
Notes on Emergent Gravity
Sunggeun Lee, Raju Roychowdhury, Hyun Seok Yang
Emergent gravity is aimed at constructing a Riemannian geometry from U(1) gauge fields on a noncommutative spacetime. But this construction can be inverted to find corresponding U(…
Kähler moduli inflation and WMAP7
Sunggeun Lee, Soonkeon Nam
Inflationary potentials are investigated for specific models in type IIB string theory via flux compactification. As concrete models, we investigate several cases where the interna…
Walls in supersymmetric massive nonlinear sigma model on complex quadric surface
Masato Arai, Sunggeun Lee, Sunyoung Shin
The Bogomol'nyi-Prasad-Sommerfield (BPS) multiwall solutions are constructed in a massive Kahler nonlinear sigma model on the complex quadric surface, Q^N=SO(N+2)/[SO(N)\times SO(2…
Behavior of tachyon in string cosmology based on gauged WZW model
Sunggeun Lee, Soonkeon Nam
We investigate a string theoretic cosmological model in the context of the gauged Wess-Zumino-Witten model. Our model is based on a product of non-compact coset space and a spectat…