Stuttgart 2012 – wissenschaftliches Programm
Q 34.31: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II
Collision of two-dimensional anisotropic solitons — •Damir Zajec, Patrick Köberle, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart
Using the Gross-Pitaevskii equation, we perform grid calculations to determine the groundstates of anisotropic two-dimensional solitons in dipolar Bose-Einstein condensates, confined only perpendicular to the polarisation axis. The Split-Operator method is used to apply a general time evolution operator to an initial state, where time evolution is mainly described by a series of Fourier transforms. Since this numerical scheme is very demanding, the parallel computing architecture CUDA was used to implement the code. We study the coherent collision of two solitons, where initially the solitons are in the repelling side-by-side configuration and move towards each other with momentum k. We change the relative phases of the condensates, and introduce a total angular momentum by shifting one of the solitons along the polarisation axis.