Heidelberg 2015 – scientific programme

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A: Fachverband Atomphysik

A 10: Poster: Interaction with strong or short laser pulses

A 10.11: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Exploring quantum dynamics without time propagation — •Mehrdad Baghery, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

According to Schrödinger equation, the dynamics of a quantum system is obtained by successively applying the time evolution operator to the wavefunction. This procedure, thought seemingly simple, is not parallel in general, and this may become an obstacle as the size of the system increases.

In this study, time and space are treated on an equal footing, i.e. basis functions are used in both time and space to describe the evolution of the system. This way, one can find a system of sparse linear equations whose solution gives the evolution of the wavefunction as function of time. Considering the fact that solving a system of sparse linear equations may be parallel, the hope is to find a method to calculate the evolution of a quantum system using a parallel algorithm.