  We investigate the photoionization dynamics of atoms subjected to intense,
ultrashort laser pulses through the use of quantum trajectories. This method
provides a unique and consistent framework for examining electron dynamics
within a time-dependent potential barrier. Our findings demonstrate that
quantum trajectories offer additional insights into several key aspects of
strong-field ionization, including the transition between ionization regimes,
non-adiabatic effects under the barrier, the impact of the shape of the
electronic potential, and the efficiency of over-the-barrier ionization.
