Exact interpolation between Fick and Cattaneo diffusion in relativistic kinetic theory

Author(s): L. GavassinoWe construct a family of exactly solvable relativistic kinetic theories in 1+1 dimensions whose hydrodynamic sector continuously interpolates between Fick's and Cattaneo's laws of diffusion. The interpolation is controlled by a single parameter a∈[0,1], which tunes the microscopic scattering dynamic…[Phys. Rev. E 114, 034132] Published Wed Sep 16, 2026