Linear response theory relates hydrodynamic transport coefficients to equilibrium retarded correlation functions of the stress-energy tensor and global symmetry currents in terms of Kubo formulas.

Formulating linear response theory for superfluids is a long standing problem.

We present an algebraic framework for deriving Kubo formulas for non-dissipative transport coefficients by using the equilibrium partition function.

Possible holographic models in which our Kubo formulas can be evaluated will be reviewed.