A direct solution of the time-dependent Schrödinger equation ~TDSE! for a two-electron model atom in a strong electromagnetic field is used to extract probabilities for both single and double electron ionization. For three-photon ionization at a moderately strong intensity, the TDSE calculations find single ionization at 62%, single ionization with excitation at 10%, and double ionization at 3%...

This work describes the first observations of the ionisation of neon in a metastable atomic state utilising a strong-field, few-cycle light pulse. We compare the observations to theoretical predictions based on the Ammosov-Delone-Krainov (ADK) theory and a solution to the time-dependent Schrödinger equation (TDSE). The TDSE provides better agreement with the experimental data than the ADK theor...

We present in this paper a numerical Maxwell-Schrödinger model and a methodology to simulate intense ultrashort lasers interacting with a 3D H 2 -gas under and beyond Born-Oppenheimer approximation. After a presentation of the model and a short mathematical study, we will examine some issues on its numerical computation. In particular we will focus on the polarization computation allowing the c...

The following text is a summary of the same-titled talk given within the frame of the seminar ’AKNUM: Seminar aus Numerik’ at the Vienna University of Technology. We address time splitting methods for the Schrödinger equation. In particular, we concentrate on the Strang splitting and prove second order convergence in the case of a bounded potential and given bounds on the (iterated) commutators...

A theoretical investigation is presented that examines the wavelength scaling from near-visible (0.8 micro m) to midinfrared (2 micro m) of the photoelectron distribution and high harmonics generated by a "single" atom in an intense electromagnetic field. The calculations use a numerical solution of the time-dependent Schrödinger equation (TDSE) in argon and the strong-field approximation in he...

The interaction of Li– with an ultrashort intense laser pulse is investigated by solving the time-dependent Schrödinger equation (TDSE) in the dipole approximation using a two-active electron approach. We describe the numerical solution of the TDSE and give a more detailed presentation of a technique for obtaining angular distributions for double ionization by intense ultrashort laser pulses. W...

In this paper a novel method for acoustic emission (AE) source location in dispersive media is presented by processing the low-frequency components of the flexural waves arrived in arbitrary positioning transducers. The accurate location of the source is obtained by minimizing the time-domain square error (TDSE) between a model-based AE source signals arrived at any sensor and the real signals....

We study a model for frustrated tunneling ionization using ultrashort laser pulses. The is based on the strong field approximation and it employs saddle point to predict quasiclassical trajectories that are captured Rydberg states. present classification of saddle-point solutions explore their behavior as functions angular momentum final state, well carrier--envelope phase (CEP) pulse. compare ...

Abstract We studied the effects of Coulomb potential on high-order harmonic generation (HHG) numerically and analytically. focus influence emission times HHG associated with specific electron trajectories. By using a numerical procedure based solution time-dependent Schrödinger equation (TDSE) in three dimensions, we extract both for long short compare TDSE predictions those Coulomb-modified mo...

Photoionization of rubidium atoms cooled in a magneto-optical trap, characterized by the coexistence ground $5{S}_{1/2}$ and excited $5{P}_{3/2}$ states, is investigated experimentally theoretically with 400-nm femtosecond laser pulses at intensities $I=(3\ifmmode\times\else\texttimes\fi{}{10}^{9})\text{--}(4.5\ifmmode\times\else\texttimes\fi{}{10}^{12})$ $\mathrm{W}/{\mathrm{cm}}^{2}$. The rec...