  We show that a composite-field (diatom) Goldstone state is expected in a
dilute Bose gas for temperatures between the Bose gas critical temperature
where the atom Bose-Einstein condensate appears and the temperature where
superfluidity sets in. The presence of superfluidity is tied to the existence
of a U(1) charge-two diatom condensate in the system. By promoting the global
U(1) symmetry of the theory to a gauge symmetry, we find that the mass of the
gauge particle generated through the Anderson-Higgs mechanism is related to the
superfluid density via the Meissner effect and the superfluid density is
related to the square of the anomalous density in the Bose system.
