String loop corrections and de Sitter vacua

Abstract

The problem of moduli stabilisation is discussed in type IIB/F-theory. Considering a configuration of three intersecting D7 branes with fluxes, it is shown that higher loop effects induce logarithmic corrections to the Kähler potential which can stabilise Kähler moduli, in particular the internal volume of the compactification space in 4 dimensions. It is also explained how Dterm contributions to the effective potential stabilise the rest of the Kähler moduli and uplift to de Sitter vacua.