Hall viscosity, topological states and effective theories
  Hall viscosity is a dissipationless transport coefficient whose value is quantized in units of the density in some topological phases and may be used as a measure of topological order. I give an overview of the Hall viscosity, its relation to Hall conductivity in Galilean invariant theories and its realization in effective theories. 
Carlos Hoyos
cond-mat.mes-hall hep-th