We consider harmonic generation by atoms exposed to an intense laser pulse of a few
femtoseconds. Our results, obtained by solving numerically the corresponding three …

The general properties of the Coulomb Green's function are presented, together with its
available compact integral representations and discrete state expansions. These …

Publisher Summary This chapter provides an overview on various scattering and reaction
processes taking place in a powerful laser field. These processes can be either laser …

We describe a numerical method used previously [Phys. Rev. A 70, 011404 (R)(2004)] for
solving the three-dimensional time-dependent Schrödinger equation for H 2+(with fixed …

We give a detailed account of an ab initio computational treatment of multiphoton single
ionization (with or without excitation) as well as double ionization of two-electron atoms …

We present a generalization of the S-matrix theory of above-threshold ionization (ATI), which
includes both the Coulomb and rescattering effects. The Coulomb effects are responsible for …

We describe an ab initio and nonperturbative R-matrix with time-dependence theory for
ultrafast atomic processes in light fields of arbitrary polarization. The theory is applicable to …

We study two-photon double ionization of helium in its ground state at sufficiently low laser
intensities so that three and more photon absorptions are negligible. In the regime where …

In the tunneling regime for strong laser field ionization of atoms, experimental studies have
shown that a substantial fraction of atoms survive the laser pulse in many Rydberg states. To …

We present a new method for investigating the nonperturbative quantum mechanical
interaction of light with atoms in two dimensions, without a basis expansion. This enables us …