We present a parallel Cartesian-grid-based time-dependent Schrödinger equation (TDSE) solver for modeling laser–atom interactions. It can simulate the single-electron dynamics of atoms in arbitrary time-dependent vector potentials.We use a split-operatormethod combinedwith fast Fourier transforms (FFT), on a three-dimensional (3D) Cartesian grid. Parallelization is realized using a 2D decomposi...

PURPOSE Status epilepticus (SE) is an important neurological emergency. Early diagnosis could improve outcomes. Traditionally, SE is defined as seizures lasting at least 30 min or repeated seizures over 30 min without recovery of consciousness. Some specialists argued that the duration of seizures qualifying as SE should be shorter and the operational definition of SE was suggested. It is uncle...

Grandin, M. 2014. Adaptive Solvers for High-Dimensional PDE Problems on Clusters of Multicore Processors. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1199. 34 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9095-9. Accurate numerical solution of time-dependent, high-dimensional partial differential equations (PDEs) usually req...

We analytically describe the strong-field light-electron interaction using a quantized coherent laser state with arbitrary photon number. We obtain a light-electron wave function which is a closed-form solution of the time-dependent Schrödinger equation (TDSE). This wave function provides information about the quantum optical features of the interaction not accessible by semi-classical theories...

We study the higher-harmonic generation (HHG) using elliptically polarized two-color driving fields. The HHG via bi-chromatic counter-rotating laser fields is a promising source of circularly ultrashort XUV radiation at attosecond time scale. ellipticity or polarization pulses can be tweaked by modifying emitted harmonics' ellipticity, which controlled varying driver propose simple setup to con...

We show that high-order harmonics generated from molecules by intense laser pulses can be expressed as the product of a returning electron wave packet and the photo-recombination cross section where the electron wave packet can be obtained from the simple strong-field approximation (SFA) or from a companion atomic target. Using these wave packets but replacing the photo-recombination cross sect...

This paper is devoted to the efficient computation of the Time Dependent Schrödinger Equation (TDSE) for quantum particles subject to intense electromagnetic fields including ionization and recombination of electrons with their parent ion. The proposed approach is based on a domain decomposition technique, allowing a fine computation of the wavefunction in the vicinity of the nuclei located in ...

With considerable NASA support, the scientific community has learned much in recent decades about the process of dendritic crystal formation, particularly as an example of steady-state pattern formation. Recently, efforts here and elsewhere have shifted towards the study of the timevarying aspects of the process. This paper will discuss the recent observations of the Transient Dendritic Solidif...

By numerically solving the time-dependent Schrödinger equation (TDSE), harmonic generation process of atoms irradiated by corotating laser pulses composed a fundamental-frequency and high-frequency field is systematically studied. Compared with generated from counter-rotating two-color circularly polarized pulses, efficiency co-rotating (CRTCCP) same parameters higher. The harmonics are multiph...