“A scale separation between the space-time’s and the internal dimensions’s degrees of freedom can be obtained by adjusting the parameters of the string geometry. We describe this scale hierarchy and the cosmological evolution of the scalar fields for type IIB string theory on the geometry of the mirror quintic.”

“We study novel non-Abelian dualities between gauged linear sigma models, which constitute an ultraviolet description of string theory. These dualities can lead to new physical symmetries between different geometries.”