  This paper considers the structure and physical processes in the transition
region at the border between the regions of false and physical vacuums in a
cavitation model of the inflationary stage of the Big Bang. It is shown that in
the process of the formation of physical vacuum bubbles in a false vacuum,
conditions for the formation of a narrow layer filled with matter arise in the
transition region, which is the precursor to bridges in the observed
large-scale cellular structure of the universe.
