摘要：
Chaotic transport, and the escape of trajectories from defined regions
of phase space, has been an important topic in dynamics for many
years, because it describes phenomena that occur in many branches of
physics. For example, some meteorites that fell on Antarctica are
believed to have come from Mars; how they escaped from Mars’
gravitational field is a problem in the theory of chaotic transport.
At a smaller scale, one of the important topics in nanophysics is
ballistic transport of electrons through a small junction: electrons
enter a junction from one lead, bounce around within the junction
following either regular or chaotic paths, and eventually find their
way to an exit lead.  A closely related problem is chaotic propagation
of light rays in a distorted cylindrical glass bead.  At the molecular
level, we may think about the breakup of a temporarily bound complex,
such as a He atom weakly bound to an I2 molecule.  At the atomic
level, the ionization of an excited hydrogen atom in applied electric
and magnetic fields is an ideal candidate for the laboratory study of
chaotic transport.   We examine the time required for the electron to
escape as a function of its initial direction.  This escape- time plot
has fractal structure.  In this talk, we describe new methods for
analyzing and observing this fractal.
报告人简介：
Research Associate - University of British Columbia - 1970-1971;
Assistant Professor - College of William and Mary - 1971-1977;
Associate Professor - College of William and Mary - 1977-1983;
Visiting Research Scientist, FOM Institute, Amsterdam, 1979-1980;
Consultant, Naval Surface Weapons Center, 1981;
Professor - College of William and Mary - 1983-present;
Visiting Fellow, JILA, 1986-87; 
Visiting Scientist, Harvard-Smithsonian Center for Astrophysics, 1992;
Visiting Fellow, JILA, 1994-1995