Hamiltonian structure of Hamiltonian chaos

Details Hamiltonian structure of Hamiltonian chaos Hamiltonian structure of Hamiltonian chaos

1998-03-04

arxiv.org/abs/physics/9803006v1

Physics Letters A 236 (1997) 476-482

Physics

Classical Physics

Scientific paper

10.1016/S0375-9601(97)00797-4

From a kinematical point of view, the geometrical information of hamiltonian chaos is given by the (un)stable directions, while the dynamical information is given by the Lyapunov exponents. The finite time Lyapunov exponents are of particular importance in physics. The spatial variations of the finite time Lyapunov exponent and its associated (un)stable direction are related. Both of them are found to be determined by a new hamiltonian of same number of degrees of freedom as the original one. This new hamiltonian defines a flow field with characteristically chaotic trajectories. The direction and the magnitude of the phase flow field give the (un)stable direction and the finite time Lyapunov exponent of the original hamiltonian. Our analysis was based on a $1{1\over 2}$ degree of freedom hamiltonian system.

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