Michele Cicoli (Cambridge U.)
We discuss some cosmological implications of the so-called LARGE Volume
Scenarios which emerge naturally from type IIB flux compactifications on
Calabi-Yau three-folds. Their main feature is the presence of an exponentially
large volume of the extra dimensions which provides a natural solution of the
hierarchy problem within a robust effective field theory.
After presenting a detailed analysis of the moduli stabilisation mechanism at
the basis of these constructions, we describe an inflationary model which
yields observable gravity waves without the need of fine-tuning any of the
underlying parameters. Finally we study finite-temperature corrections to these
scenarios, and show how they give rise to a decompactification temperature
which sets a maximal temperature of our Universe.
Arnold Sommerfeld Center