  We present a method to control transport in Hamiltonian systems. We provide
an algorithm - based on a perturbation of the original Hamiltonian localized in
phase space - to design small control terms that are able to create isolated
barriers of transport without modifying other parts of phase space. We apply
this method of localized control to a forced pendulum model and to a system
describing the motion of charged particles in a model of turbulent electric
field.
