“…Also the spatiotemporal fluctuations of the densities ρ α (x,t) of globally conserved quantities N α (such as mass, energy, etc.) are frequently characterized by non-diffusive scaling properties with dynamical exponents z α = 2, including the celebrated Kardar-Parisi-Zhang (KPZ) universality class where z = 3/2 [11,27], and another universality class with z = 3/2 [1,2,17,25].…”