Inflationary α-attractor from type IIB/F theory

Abstract

We derive an α=1/3-- attractor potential of slow-roll inflation in the warped D brane set-up featuring three intersecting D7 branes under T6 /ZN type of CY3-compactification within type IIB/F theory with some near-conifold regions. The underlying quadratic structure of the kinetic poles is found to arise from a correction in the Kähler potential when an extra contribution of open string moduli is turned on. While the closed string sector of the moduli spectrum is completely stabilized via quantum corrections of perturbative and non-perturbative origin, the open string sector plays the lead role in driving the inflationary expansion in the radial direction. A generic asymptotic behavior of the inflaton field near the pole boundaries manifests as the slow-roll plateau in canonical field space, which becomes responsible for giving universal predictions of the cosmological parameters. We find that the presence of the open strings near conifold regions brings the realization of pole inflation in the present set up.