A geometric mechanism of diffusion: Rigorous verification in a priori unstable Hamiltonian systems

Details A geometric mechanism of diffusion: Rigorous verification in a priori unstable Hamiltonian systems A geometric mechanism of diffusion: Rigorous verification in a priori unstable Hamiltonian systems

2010-07-16

arxiv.org/abs/1007.2739v1

Mathematics

Dynamical Systems

Scientific paper

In this paper we consider a representative a priori unstable Hamiltonian system with 2+1/2 degrees of freedom, to which we apply the geometric mechanism for diffusion introduced in the paper Delshams et al., Mem. Amer. Math. Soc. 2006, and generalized in Delshams and Huguet, Nonlinearity 2009, and provide explicit, concrete and easily verifiable conditions for the existence of diffusing orbits. The simplification of the hypotheses allows us to perform explicitly the computations along the proof, which contribute to present in an easily understandable way the geometric mechanism of diffusion. In particular, we fully describe the construction of the scattering map and the combination of two types of dynamics on a normally hyperbolic invariant manifold

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