Diffusion Character in Four-Dimensional Volume-Preserving Map |
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Authors: | Yi-Sui Sun Yan-Ning Fu |
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Institution: | (1) Department of Astronomy, Nanjing University, Nanjing, 210093, P.R. China;(2) Purple Mountain Observatory, Academia Sinica, Nanjing, 210008, P.R. China |
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Abstract: | Due to the existence of invariant tori, chaotic sea and hyperbolic structures in higher dimensional phase space of a volume-preserving
map, the diffusion route of chaotic orbits will be complicated. The velocity of diffusion will be very slow if the orbits
are near an invariant torus. In order to realize this complicated diffusion phenomenon, in this paper we study the diffusion
characters in the different regions, i.e., chaotic, hyperbolic and invariant tori's regions. We find that for the three different
regions, the diffusion velocities are different. The diffusion velocity in the vicinity of an invariant torus is the slowest
one.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Volume-Preserving map Invariant tori Diffusion |
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