title: Dynamics of "leaking" Hamiltonian systems.
abstract: In order to understand the dynamics in more detail, in particular for visualizing the space-filling unstable foliation of closed chaotic Hamiltonian systems, we propose to leak them up. The cutting out of a finite region of their phase space, the leak, through which escape is possible, leads to transient chaotic behavior of nearly all the trajectories. The never-escaping points belong to a chaotic saddle whose fractal unstable manifold can easily be determined numerically. It is an approximant of the full Hamiltonian foliation, the better the smaller the leak is. The escape rate depends sensitively on the orientation of the leak even if its area is fixed. The applications for chaotic advection, for chemical reactions superimposed on hydrodynamical flows, and in other branches of physics are discussed.
authors.affiliation: Department of Physics, University of Potsdam, PF 601553, Germany.
authors.forename: Judit
authors.initials: J
authors.lastname: Schneider
authors.forename: Tamás
authors.initials: T
authors.lastname: Tél
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Neufeld