A note on generalized hydrodynamics: inhomogeneous fields and other concepts

摘要: Generalized hydrodynamics (GHD) was proposed recently as a formulation of for integrable systems, taking into account infinitely-many conservation laws. In this note we further develop the theory in various directions. By extending GHD to all commuting flows model, provide full description how take weakly varying force fields, temperature fields and other inhomogeneous external within GHD. We expect can be used, instance, characterize non-equilibrium dynamics one-dimensional Bose gases trap potentials. show equations state at core follow from continuity relation entropy, recover Euler-like discuss possible viscosity terms.