A new class of de Sitter vacua in String Theory Compactifications
  We revisit the stability of the complex structure moduli in the large volume
regime of type-IIB flux compactifications. We argue that when the volume is not
exponentially large, such as in K\"ahler uplifted dS vacua, the quantum
corrections to the tree-level mass spectrum can induce tachyonic instabilities
in this sector. We discuss a Random Matrix Theory model for the classical
spectrum of the complex structure fields, and derive a new stability bound
involving the compactification volume and the (very large) number of moduli. We
also present a new class of vacua for this sector where the mass spectrum
presents a finite gap, without invoking large supersymmetric masses. At these
vacua the complex structure sector is protected from tachyonic instabilities
even at non-exponential volumes. A distinguishing feature is that all fermions
in this sector are lighter than the gravitino.
