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arXiv 1609.07977nlin.CDmath.DS
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在高维系统中,幂律分布的庞加莱递归的机制是什么?

What is the mechanism of power-law distributed Poincaré recurrences in higher-dimensional systems?

Steffen Lange, Arnd Bäcker, Roland Ketzmerick

摘要:

哈密顿系统的庞加莱递归时间的统计通常表现出幂律衰减,混沌轨道长时间粘附在某些相空间区域。对于高维系统,这种幂律捕获的机制仍然是未知的。我们在相空间和频率空间中研究了一般四维辛映射的陷阱轨道,发现与二维映射相比,陷阱轨道不是由于相空间中的层次结构造成的。相反,它发生在表面的规则区域,(ii)外的阿诺德网络。在这个粘性区域的混沌动力学是(三)占主导地位的共振通道,达到远到混沌区域:我们观察到(iii. a)明确的签名的某种部分运输障碍和猜想(iii.b)一个随机过程,沿共振通道的有效漂移。这两个过程奠定了基础,未来的理解机制的幂律捕获在高维系统。

英文摘要:

The statistics of Poincaré recurrence times in Hamiltonian systems typically shows a power-law decay with chaotic trajectories sticking to some phase-space regions for long times. For higher-dimensional systems the mechanism of this power-law trapping is still unknown. We investigate trapped orbits of a generic 4D symplectic map in phase space and frequency space and find that, in contrast to 2D maps, the trapping is (i) not due to a hierarchy in phase space. Instead, it occurs at the surface of the regular region, (ii) outside of the Arnold web. The chaotic dynamics in this sticky region is (iii) dominated by resonance channels which reach far into the chaotic region: We observe (iii.a) clear signatures of some kind of partial transport barriers and conjecture (iii.b) a stochastic process with an effective drift along resonance channels. These two processes lay the basis for a future understanding of the mechanism of power-law trapping in higher-dimensional systems.

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