  A general semiclassical method in phase space based on the final value
representation of the Wigner function is considered that bypasses caustics and
the need to root-search for classical trajectories. We demonstrate its
potential by applying the method to the Kerr Hamiltonian, for which the exact
quantum evolution is punctuated by a sequence of intricate revival patterns.
The structure of such revival patterns, lying far beyond the Ehrenfest time, is
semiclassically reproduced and revealed as a consequence of constructive and
destructive interferences of classical trajectories.
