Towards a Hydrodynamic Theory of Infinite Neutral Nonrelativistic Matter
  We recast the problem of infinite neutral nonrelativistic matter interacting via U(1) gauge fields in the hydrodynamic language. We treat the nuclei as being spinless bosons for simplicity(for example in He4). We write down the formal action in terms of a full set of independent gauge invariant hydrodynamic variables.   The claim is that the results of this theory are nonperturbative and nuclei and electrons are treated on an equal footing. 
Girish S. Setlur (HRI)