Self-consistent initial conditions in inflationary cosmology.

A physically self-consistent approach to the initial conditions for inflationary cosmology is proposed, which involves both space-time (de Sitter group) and internal symmetries. The process of decay of the inflationary vacuum is considered as evaporation of a Bose condensate, which results in the proper choice of an asymmetric vacuum state, as well as in nonslow-rolling transition to the FRW cosmology, which in turn avoids the fine tuning in initial conditions for inflation. The dynamics of the cosmological constant is directly related to the hierarchy of particle symmetry breaking, thus making the approach, as proposed, physically self-consistent.