Self-similarity, renormalization, and phase space nonuniformity of Hamiltonian chaotic dynamics.

A detailed description of fractional kinetics is given in connection to islands' topology in the phase space of a system. The method of renormalization group is applied to the fractional kinetic equation in order to obtain characteristic exponents of the fractional space and time derivatives, and an analytic expression for the transport exponents. Numerous simulations for the web-map and standard map demonstrate different results of the theory. Special attention is applied to study the singular zone, a domain near the island boundary with a self-similar hierarchy of subislands. The birth and collapse of islands of different types are considered. (c) 1997 American Institute of Physics.