Abstract 

Motivated by the search for universal behaviour in quantum gravity, asymptotic regions of the moduli space have been studied in great detail in recent years.
However, especially in the context of minimal supersymmetry, quantum corrections to the classical effective action can severely modify and even completely remove naively infinite directions in the moduli space. We will study this surprising effect in the context of 4d N=1 Type II orientifolds and their F- or M-theory lifts. Using a variety of complementary ideas, we argue that infinite distance limits in the moduli sector inherited from the vector multiplets of an underlying N=2 theory do not exist once quantum effects are taken into account. This general observation may also affect phenomenologically important concepts such as moduli stabilization towards boundaries of moduli space.