affiliation not provided to SSRN
relativistic hydrodynamics, dark energy, preferred reference frame, general relativity, minimal velocity
K-EssenceRelativistica HydrodynamicsCritical-SpeedSuperfluidsCausal StructureMinimal Speed
Analogue gravity \sep Disformal geometry \sep Superfluid spacetime \sep Optical metrics \sep Non-integrable foliation \sep Vorticity