Dynamical properties of a particle in a time-dependent double-well potential

Some chaotic properties of a classical particle interacting with a timedependent double-square-well potential are studied. The dynamics of the system is characterised using a two-dimensional nonlinear area-preserving map. Scaling arguments are used to study the chaotic sea in the low energy domain. It is shown that the distributions of successive reflections and of corresponding successive reflection times obey power laws with the same exponent. If one or both wells move randomly, the particle experiences the phenomenon of Fermi acceleration in the sense that it has unlimited energy growth.