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arXiv 0808.0432nlin.CDcond-mat.stat-mech
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时空混沌中特征李雅普诺夫向量的结构

Structure of characteristic Lyapunov vectors in spatiotemporal chaos

Diego Pazó, Ivan G. Szendro, Juan M. López, Miguel A. Rodríguez

摘要:

研究了时空混沌系统中最大李雅普诺夫指数对应的李雅普诺夫向量。我们专注于特征的LV和比较的结果通过连续的Gram-Schmidt orthonormalizations后向LV。性质非常不同的系统,如耦合映射格子和(连续时间)Lorenz '96模型,在定量和定性方面表现出相同的特征。此外,我们提出了一个最小的随机模型,重现混沌系统的结果。我们的工作支持了我们早期结果的普适性[I]。G. Szendro等人,Phys.Rev.E76,025202(R)(2007)]。

英文摘要:

We study Lyapunov vectors (LVs) corresponding to the largest Lyapunov exponents in systems with spatiotemporal chaos. We focus on characteristic LVs and compare the results with backward LVs obtained via successive Gram-Schmidt orthonormalizations. Systems of a very different nature such as coupled-map lattices and the (continuous-time) Lorenz `96 model exhibit the same features in quantitative and qualitative terms. Additionally we propose a minimal stochastic model that reproduces the results for chaotic systems. Our work supports the claims about universality of our earlier results [I. G. Szendro et al., Phys. Rev. E 76, 025202(R) (2007)] for a specific coupled-map lattice.

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