The Lévy-Fokker-Planck equation: Phi-entropies and convergence to equilibrium
Résumé
In this paper, we study a Fokker-Planck equation of the form u_t = I [u ] + div (x u) where the operator I [u], which is usually the Laplacian, is replaced with a general Lévy operator. We prove by the entropy production method the exponential decay in time of the solution to the only steady state of the associated equation.