  A version of the cosmological perturbation theory in general relativity (GR)
is developed, where the cosmological scale factor is identified with spatial
averaging of the metric determinant logarithm and the cosmic evolution acquires
the pattern of a superfluid motion: the absence of "friction-type" interaction,
the London-type wave function, and the Bogoliubov condensation of quantum
universes. This identification keeps the number of variables of GR and leads to
a new type of potential perturbations. A set of arguments is given in favor of
that this "superfluid" version of GR is in agreement with the observational
data.
