We exhibit a large class of Lyapunov functionals for nonlinear drift–diffusion equations with non-homogeneous Dirichlet boundary conditions. These are generalizations of large deviation functionals for underlying stochastic many-particle systems, the zero-range process and the Ginzburg–Landau dynamics, which we describe briefly. We prove, as an application, linear inequalities between such an entropy-like functional and its entropy production functional for the boundary-driven porous medium equation in a bounded domain with positive Dirichlet conditions: this implies exponential rates of relaxation related to the first Dirichlet eigenvalue of the domain. We also derive Lyapunov functions for systems of nonlinear diffusion equations, and for nonlinear Markov processes with non-reversible stationary measures.
Lyapunov functionals for boundary-driven nonlinear drift–diffusion equations
T. Bodineau,J. Lebowitz,C. Mouhot,C. Villani
Published 2013 in Nonlinearity
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- Publication year
2013
- Venue
Nonlinearity
- Publication date
2013-05-31
- Fields of study
Mathematics, Physics
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