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arXiv 1803.04043nlin.CD
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相对论混沌散射中的不确定维数和盆熵

Uncertainty dimension and basin entropy in relativistic chaotic scattering

Juan D. Bernal, Jesús M. Seoane, Miguel A. F. Sanjuán

摘要:

混沌散射是非线性动力学和混沌学的重要研究课题,在物理学和工程学的许多领域都有着广泛的应用。相对论系统中的这一现象的研究与牛顿系统相比,很少受到关注。本文主要研究了相对论性Hénon-Heiles系统出口盆拓扑的一些相关性质:不确定维数、Wada性质和盆熵.我们的主要研究结果的不确定性维度显示两种不同的行为,只要我们改变相对论性参数$β$,其中的交叉行为被发现。该交叉点与KAM岛在相空间中的消失有关,这发生在速度值高于超相对论极限$v>0.1c$时。这一结果得到了数值模拟和定性分析的支持,两者吻合得很好。另一方面,在相空间中的出口盆地的计算表明Wada盆地的存在范围$β<0.625$。我们还研究了出口盆地的演化,在定量的方式通过计算盆地熵,这表明$β\approx 0.2$的最大值。最后一个量与系统最终命运预测的不确定性有关。最后,我们的工作是相关的星系动力学,它也有重要的影响,在物理学的其他主题,如在Störmer问题,等等。

英文摘要:

Chaotic scattering is an important topic in nonlinear dynamics and chaos with applications in several fields in physics and engineering. The study of this phenomenon in relativistic systems has receivedlittle attention as compared to the Newtonian case. Here, we focus our work on the study of some relevant characteristics of the exit basin topology in the relativistic Hénon-Heiles system: the uncertainty dimension, the Wada property and the basin entropy. Our main findings for the uncertainty dimension show two different behaviors insofar we change the relativistic parameter $β$, in which a crossover behavior is uncovered. This crossover point is related with the disappearance of KAM islands in phase space that happens for velocity values above the ultra-relativistic limit, $v>0.1c$. This result is supported by numerical simulations and also by qualitative analysis, which are in good agreement. On the other hand, the computation of the exit basins in the phase space suggests the existence of Wada basins for a range of $β<0.625$. We also studied the evolution of the exit basins in a quantitative manner by computing the basin entropy, which shows a maximum value for $β\approx 0.2$. This last quantity is related to the uncertainty in the prediction of the final fate of the system. Finally, our work is relevant in galactic dynamics and it also has important implications in other topics in physics as in the Störmer problem, among others.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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