Numerical calculation of strong-field laser-atom interaction: An approach with perfect reflection-free radiation boundary conditions
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- Heinen, M. & Kull, HJ. Laser Phys. (2010) 20: 581. doi:10.1134/S1054660X10050063
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The time-dependent, single-particle Schrödinger equation with a finite-range potential is solved numerically on a three-dimensional spherical domain. In order to correctly account for outgoing waves, perfect reflection-free radiation boundary conditions are used on the surface of a sphere. These are computationally most effective if the particle wavefunction is expanded in the set of spherical harmonics and computations are performed in the Kramers-Henneberger accelerated frame. The method allows one to solve the full ionization dynamics in intense laser fields within a small region of atomic dimensions.