Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 42: Poster Session IIIb
A 42.3: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Zelt Ost
Many-Body Quantum Dynamics in the Decay of Bent Dark Solitons of Bose-Einstein Condensates — •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, Universit at Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, MA 01003-4515, USA
We examine the case of a bent dark soliton comparing the mean-field dynamics to a correlated approach. Dynamical snaking of this bent structure is observed, signaling the onset of fragmentation. In contrast to the mean-field approximation ``filling" of the vortex core is observed, leading to the formation of filled-core vortices. We show that this filling owes its existence to the dynamical building of an antidark structure developed in the next-to-leading order orbital. We further demonstrate that the aforementioned beyond mean-field dynamics can be experimentally detected using the variance of single shot measurements. Additionally, a variety of excitations including vortices, oblique dark solitons, and open ring dark soliton-like structures building upon higher-lying orbitals is observed. Signatures of the higher-lying orbital excitations emerge in the total density, and can be clearly captured by inspecting the one-body coherence. In the latter context, the localization of one-body correlations exposes the existence of the multi-orbital vortex-antidark structure.