  As a contribution to a viable candidate for a standard model of cosmology, we
here show that pre-inflationary quantum fluctuations can provide a scenario for
the long-sought initial conditions for the inflaton field. Our proposal is
based on the assumption that at very high energies (higher than the energy
scale of inflation) the vacuum-expectation value (VeV) of the field is trapped
in a false vacuum and then, due to renormalization-group (RG) running, the
potential starts to flatten out toward low energy, eventually tending to a
convex one which allows the field to roll down to the true vacuum. We argue
that the proposed mechanism should apply to large classes of inflationary
potentials with multiple concave regions. Our findings favor a particle physics
origin of chaotic, large-field inflationary models as we eliminate the need for
large field fluctuations at the GUT scale. In our analysis, we provide a
specific example of such an inflationary potential, whose parameters can be
tuned to reproduce the existing cosmological data with good accuracy.
