Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 42: Poster Session IIIb
A 42.8: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Zelt Ost
Many-Body Dark-Bright Soliton Dynamics — •Simeon Mistakidis1, Garyfallia Katsimiga1, Georgios Koutentakis1,2, Panagiotis Kevrekidis3, and Peter Schmelcher1,2 — 1Zentrum für optische Quantentechnologien Luruper Chaussee 149 22761 Hamburg — 2he Hamburg Centre for Ultrafast Imaging, Universitat Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, MA 01003-4515, USA
The dynamics of dark-bright solitons beyond the mean-field approximation is investigated. We first examine the case of a single dark-bright soliton and its oscillations within a parabolic trap. Subsequently, we move to the setting of collisions. Fragmentation is present and significantly affects the dynamics, especially in the case of slower solitons and in that of lower atom numbers. It is shown that the presence of fragmentation allows for bipartite entanglement between the distinguishable species. Most importantly the interplay between fragmentation and entanglement leads to the splitting of each of the parent mean-field dark-bright solitons, placed off- center within the parabolic trap, into a fast and a slow daughter solitary wave. The latter process is in direct contrast to the predictions of the mean-field approximation. A variety of excitations including dark-bright solitons in multiple (concurrently populated) orbitals is observed. Dark-antidark states and domain-wall-bright soliton complexes can also be observed to arise spontaneously in the beyond mean-field dynamics.