Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.27: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Solving the time-dependent Dirac equation on massively parallel architectures — •Heiko Bauke and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

New parallel computing architectures emerged in the last few years, as for example, multicore systems and graphics processing units with general purpose computing capabilities, and it is expected that all major future computing architectures will be parallel. The new emerging ubiquitous parallel architectures challenge the computational physics community by calling for new parallel numerical algorithms. In our contribution, we present a massively parallel implementation of the Fourier split operator method for propagating time-dependent Dirac equation on multicore systems or graphics processing units. Our implementation is up to more than one order of magnitude faster than traditional sequential implementations. Thus, it allows to propagate wave functions over larger time intervals than it is possible with sequential programs and it permits to propagate broad wave functions with high accuracy. We will also present some applications of our code to problems of light matter interaction in intense laser fields.