Asymptotic behavior of Nernst-Planck equation

Xingyu Li (1)

1 CEREMADE - CEntre de REcherches en MAthématiques de la DEcision

This paper is devoted to the Nernst-Planck system of equations with an external potential of confinement. The main result is concerned with the asymptotic behaviour of the solution of the Cauchy problem. We will prove that the optimal exponential rate of convergence of the solution to the unique stationary solution is determined by the spectral gap of the linearized problem around the minimizer of the free energy. The key issue is to consider an adapted notion of scalar product.

Mots clés: Nernst-Planck equation; large time asymptotic; free energy; Fisher information; spectral gap AMS subject classifications: 35B40; 35P15; 35Q70

Domaines: Mathématiques [math]; Equations aux dérivées partielles [math.AP]

Xingyu Li. Asymptotic behavior of Nernst-Planck equation. 2019. ⟨hal-02310654⟩