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首页> 外文期刊>Discrete and continuous dynamical systems >INSTABILITY FOR A PRIORI UNSTABLE HAMILTONIAN SYSTEMS: A DYNAMICAL APPROACH
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INSTABILITY FOR A PRIORI UNSTABLE HAMILTONIAN SYSTEMS: A DYNAMICAL APPROACH

机译:先验不稳定哈密顿系统的不稳定性:一种动力学方法

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摘要

In this article, we consider an a priori unstable Hamiltonian system with three degrees of freedom, for which we construct a drifting solution with an optimal time of instability. Such a result has been already proved by Berti, Bolle and Biasco using variational arguments, and by Treschev using his separatrix map theory. Our approach is new: it is based on a special type of symbolic dynamics corresponding to the random iteration of a family of twist maps of the annulus, and it gives the first concrete application of this idea introduced by Moeckel in an abstract setting and further studied by Marco. Our method should also be useful in obtaining the optimal time of instability in the more difficult context of a priori stable Hamiltonian systems.
机译:在本文中,我们考虑具有三个自由度的先验不稳定汉密尔顿系统,为此我们构造了具有最佳不稳定时间的漂移解。 Berti,Bolle和Biasco已经使用变分论证,并且Treschev使用他的分离线图论已经证明了这样的结果。我们的方法是新的:它基于一种特殊的符号动力学类型,它对应于环形扭曲图族的随机迭代,并且为Moeckel在抽象背景下引入的这种思想提供了首次具体应用,并进行了进一步研究。由Marco。在先验稳定哈密顿系统的较困难情况下,我们的方法在获得最佳不稳定性时间方面也应该是有用的。

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