Speaker
Prof.
Seoktae Koh
(Jeju National University)
Description
We revisit instanton-induced compactification in eight-dimensional Einstein–Yang–Mills theory, where a self-dual SU(2) instanton on the internal $S^4$ triggers four-dimensional expansion — extending arXiv:1810.12291 (Kim et al) (2018). We show that the minimal model fails to support successful inflation- it has neither a stabilized vacuum nor a slow-roll plateau. Introducing an eight-dimensional cosmological constant $\Lambda_8$ together with the one-loop Casimir energy of the internal space cures both defects, yielding a five-term Einstein-frame radion potential with a flat hilltop and a Minkowski minimum.
Primary author
Prof.
Seoktae Koh
(Jeju National University)
