  It has recently been suggested, by Firouzjahi, Sarangi, and Tye, that
string-motivated modifications of the Hartle-Hawking wave function predict that
our Universe came into existence from "nothing" with a de Sitter-like spacetime
geometry and a spacetime curvature similar to that of "low-scale" models of
Inflation. This means, however, that the Universe was quite large at birth. It
would be preferable for the initial scale to be close to the string scale, or
perhaps the Planck scale. The problem with this, however, is to explain how any
initial homogeneity is preserved during the pre-inflationary era, so that
Inflation can indeed begin. Here we modify a suggestion due to Linde and assume
that the Universe was born with the topology of a torus; however, we propose
that the size of the torus is to be predicted by the FST wave function. The
latter does predict an initial size for the torus at about the string scale,
and it also predicts a pre-inflationary spacetime geometry such that chaotic
mixing preserves any initial homogeneity until Inflation can begin at a
relatively low scale.
