A Huygens principle for diffusion and anomalous diffusion in spatially extended systems

作者：Gottwald Georg A^*; Melbourne Ian

来源：Proceedings of the National Academy of Sciences of the United States of America, 2013, 110(21): 8411-8416.

DOI：10.1073/pnas.1217926110

• dynamical systems
• pattern formation
• lattice models
• symmetry

We present a universal view on diffusive behavior in chaotic spatially extended systems for anisotropic and isotropic media. For anisotropic systems, strong chaos leads to diffusive behavior (Brownian motion with drift) and weak chaos leads to superdiffusive behavior (Levy processes with drift). For isotropic systems, the drift term vanishes and strong chaos again leads to Brownian motion. We establish the existence of a nonlinear Huygens principle for weakly chaotic systems in isotropic media whereby the dynamics behaves diffusively in even space dimension and exhibits superdiffusive behavior in odd space dimensions.

• 出版日期2013-5-21