EFFECT OF PHASE FACTOR IN KICK APPROXIMATION FOR SUPER INTENSE FIELD-IONIZATION

Based on a simple consideration, the kick approximation used by Sundar am et al. in describing the interactions between super intense laser f ield and single atom is modified. Two different phase factors of the t wo kicks during one optical period are considered. It is found that we can introduce the factors in a very simple way and derive a new map w hich can be written in a closed form, and that to include these factor s really improves the dynamical description of the system.