Berlin 2014 – scientific programme

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A: Fachverband Atomphysik

A 10: Atomic systems in external fields

A 10.5: Talk

Monday, March 17, 2014, 15:15–15:30, BEBEL E44/46

Solving time-dependent Schrödinger and Schrödinger-like equations on a Graphical Processing Unit — •Yaroslav Lutsyshyn and Dieter Bauer — Institut für Physik, Universität Rostock, 18051 Rostock, Germany

Efficient numerical solvers for the time-dependent Schrödinger equation (TDSE) are necessary to simulate the interaction of atoms and molecules with high-intensity laser pulses on an ab-initio level. In fact, current capabilities of TDSE solvers are limited to only two active electrons in full dimensionality, and even to one for long wavelengths or very high intensities. This is because of the exceedingly large numerical grids required to capture the huge electron excursions in strong laser fields. We explore the acceleration of TDSE solvers with the help of graphical processing units (GPU). Propagation algorithms and parallelization schemes that are best suited for GPUs will be discussed. Results obtained in benchmark calculations of high-harmonic spectra and photoelectron spectra will be presented.