  We study the kick dynamics of periodically driven quantum systems, and
provide a timeindependent effective Hamiltonian with the analytical form to
reasonably describe the effective dynamics in a long timescale. It is shown
that the effective coupling strength can be much larger than the coupling
strength of the original system in some parameter regions, which stems from the
zero time duration of kicks. Furthermore, different regimes can be transformed
from and to each other in the same three-level system by only modulating the
period of periodic kicks. In particular, the population of excited states can
be selectively suppressed in periodic kicks, benefiting from the large detuning
regime of the original system. Finally, some applications and physical
implementation of periodic kicks are demonstrated in quantum systems. Those
unique features would make periodic kicks becoming a powerful tool for quantum
state engineering.
